The 2018 United States state legislative elections were held on November 6, 2018, for 87 state legislative chambers in 46 states. Across the fifty states, approximately 56 percent of all

upper house An upper house is one of two Legislative chamber, chambers of a bicameralism, bicameral legislature, the other chamber being the lower house. The house formally designated as the upper house is usually smaller and often has more restricted p ...

seats and 92 percent of all

lower house A lower house is the lower chamber of a bicameral legislature, where the other chamber is the upper house. Although styled as "below" the upper house, in many legislatures worldwide, the lower house has come to wield more power or otherwise e ...

seats were up for election. Additionally, six territorial chambers in four territories and the

District of Columbia Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and Federal district of the United States, federal district of the United States. The city is on the Potomac River, across from ...

were up as well. Democrats made significant ground in state legislative races, flipping six chambers from the Republicans and winning control of one tied chamber.

Summary table

Regularly-scheduled elections were held in 87 of the 99 state legislative chambers in the United States; nationwide, regularly-scheduled elections were held for 6,064 of the 7,383 legislative seats. Most legislative chambers held elections for all seats, but some legislative chambers that use staggered elections held elections for only a portion of the total seats in the chamber. The chambers that were not up for election either hold regularly-scheduled elections in odd-numbered years, or have four-year terms and hold all regularly-scheduled elections in presidential election years. Note that this table only covers regularly-scheduled elections; additional special elections took place concurrently with these regularly-scheduled elections.

Electoral predictions

News sources predicted Democrats would make significant gains in state legislative control, flipping multiple chambers and narrowing Republican majorities in many others. Ratings are designated as follows: * "Tossup": Competitive, no advantage * "Lean": Competitive, slight advantage * "Likely": Not competitive, but opposition could make significant gains * "Safe": Not competitive at all

National results

Democrats flipped over 350 state legislative seats from the Republicans, with Republican flips offsetting their to total net gain to just over 300 seats. Democrats picked up most of those seats in states where President Trump's approval rating was relatively low. Six chambers—the

Colorado Senate The Colorado State Senate is the upper house of the Colorado General Assembly, the state legislature of the US state of Colorado. It is composed of 35 members elected from single-member districts, with each district having a population of abou ...

, New Hampshire House,

New Hampshire Senate The New Hampshire State Senate is the upper house of the New Hampshire General Court, alongside the lower New Hampshire House of Representatives. The Senate has been meeting since 1784. The Senate consists of 24 members representing Senate distri ...

, Minnesota House,

Maine Senate The Maine Senate is the upper house of the Maine Legislature, the state legislature (United States), state legislature of the U.S. state of Maine. The Senate currently consists of 35 members representing an equal number of districts across the st ...

, and

New York State Senate The New York State Senate is the upper house of the New York State Legislature, while the New York State Assembly is its lower house. Established in 1777 by the Constitution of New York, its members are elected to two-year terms with no term l ...

—flipped from Republican to Democratic control.NCSL State Vote
National Conference of State Legislatures. Additionally the

Connecticut Senate The Connecticut State Senate is the upper house of the Connecticut General Assembly, the state legislature of the U.S. state of Connecticut. The state senate comprises 36 members, each representing a district with around 99,280 inhabitants. Se ...

went from being evenly divided to a Democratic majority. Democrats also broke Republican legislative supermajorities in

North Carolina North Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, South Carolina to the south, Georgia (U.S. stat ...

,Jim Morrill & Paul A. Specht
Blue waves in urban North Carolina help Democrats break GOP 'supermajorities'
''Charlotte Observer'' (November 7, 2018).

Michigan Michigan ( ) is a peninsular U.S. state, state in the Great Lakes region, Great Lakes region of the Upper Midwest, Upper Midwestern United States. It shares water and land boundaries with Minnesota to the northwest, Wisconsin to the west, ...

, and

Pennsylvania Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ...

, and they gained a legislative supermajority in both houses of the

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. It borders on Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash River, Wabash and Ohio River, Ohio rivers to its ...

, and

Oregon Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...

legislatures.

Maps

File:Control of US State Governments after the 2018 Midterm Elections.svg, Partisan control of states in the 2018 elections
File:2018 US State Upper House Control.svg, alt=Upper house seats by party holding majority in each state Republican 50–60% , Upper house seats by party holding majority in each state
RepublicanDemocratic File:2018 US State Lower House Control.svg, alt=Lower house seats by party holding majority in each state Republican 50–60% 60–70% 70–80% 80–90% 90–100% Democratic 50–60% 60–70% 70–80% 80–90% 90–100%, Lower house seats by party holding majority in each state
RepublicanDemocratic File:2018 US State Upper House Gains.svg, Net changes to upper house seats after the 2018 elections

File:2018 US State Lower House Gains.svg, Net changes to lower house seats after the 2018 elections

State summaries

Alabama

All members of the

Alabama Senate The Alabama State Senate is the upper house of the Alabama Legislature, the state legislature of the U.S. state of Alabama. The body is composed of 35 members representing an equal number of districts across the state, with each district con ...

and the

Alabama House of Representatives The Alabama House of Representatives is the lower house of the Alabama Legislature, the state legislature (United States), state legislature of state of Alabama. The House is composed of 105 members representing an equal number of districts, with ...

were up for election in 2018. Republicans retained control of both chambers.

Alaska

Half of the seats of the

Alaska Senate The Alaska State Senate is the upper house in the Alaska State Legislature, the state legislature of the U.S. state of Alaska. It convenes in the Alaska State Capitol in Juneau, Alaska and is responsible for making laws and confirming or reje ...

and all of the seats of the

Alaska House of Representatives The Alaska House of Representatives is the lower house in the Alaska State Legislature, the state legislature of the U.S. state of Alaska. The House is composed of 40 members, each of whom represents a district of approximately 17,756 people pe ...

were up for election in 2018. Republicans retained control of the Senate, while a cross-partisan coalition of Democrats, Republicans, and independents retained control of the House of Representatives.

Arizona

All of the seats of the

Arizona Senate The Arizona State Senate is part of the Arizona Legislature, the state legislature (United States), state legislature of the US state of Arizona. The Senate consists of 30 members each representing an average of 219,859 constituents (2009 figure ...

and the

Arizona House of Representatives The Arizona House of Representatives is the lower house of the Arizona Legislature, the state legislature (United States), state legislature of the U.S. state of Arizona. The upper house is the Arizona Senate, Senate. The House convenes in the le ...

were up for election in 2018. Republicans retained control of both chambers, but lost four seats in the House and lost the popular vote in the Senate by 1.4 points.

Arkansas

Half of the seats of the

Arkansas Senate The Arkansas State Senate is the upper branch of the Arkansas General Assembly. The Senate consists of 35 members, each representing a district with about 83,000 people. Service in the state legislature is part-time, and many state senators have ...

and all of the seats of the

Arkansas House of Representatives The Arkansas House of Representatives is the lower house of the Arkansas General Assembly, the state legislature of the US state of Arkansas. The House has 100 members elected from an equal number of constituencies across the state. Each distr ...

were up for election in 2018. Republicans retained control of both chambers.

California

Half of the seats of the

California State Senate The California State Senate is the upper house of the California State Legislature (the lower house being the California State Assembly). The state senate convenes, along with the state assembly, at the California State Capitol in Sacramento. ...

and all of the seats of the

California State Assembly The California State Assembly is the lower house of the California State Legislature (the upper house being the California State Senate). The Assembly convenes, along with the State Senate, at the California State Capitol in Sacramento, Califor ...

were up for election in 2018. Democrats retained control of both chambers.

Colorado

Half of the seats of the

and all of the seats of the

Colorado House of Representatives The Colorado House of Representatives is the lower house of the Colorado General Assembly, the state legislature of the U.S. state of Colorado. The House is composed of 65 members from an equal number of constituent districts, with each distri ...

were up for election in 2018. Democrats won control of the Senate and retained control of the House of Representatives.

Connecticut

All of the seats of the

Connecticut State Senate The Connecticut State Senate is the upper house of the Connecticut General Assembly, the state legislature of the U.S. state of Connecticut. The state senate comprises 36 members, each representing a district with around 99,280 inhabitants. Sena ...

and the

Connecticut House of Representatives The Connecticut House of Representatives is the lower house in the Connecticut General Assembly, the state legislature of the U.S. state of Connecticut. The house is composed of 151 members representing an equal number of districts, with each ...

were up for election in 2018. Democrats won control of the Senate, which was previously tied and retained control of the House of Representatives.

Delaware

Half of the seats of the

Delaware Senate The Delaware State Senate is the upper house of the Delaware General Assembly, the state legislature of the U.S. state of Delaware. It is composed of 21 Senators, each of whom is elected to a four-year term, except when reapportionment occur ...

and all of the seats of the

Delaware House of Representatives The Delaware State House of Representatives is the lower house of the Delaware General Assembly, the state legislature of the U.S. state of Delaware. It is composed of 41 Representatives from an equal number of constituencies, each of whom is ...

were up for election in 2018. Democrats retained control of both chambers.

Florida

Half of the seats of the

Florida Senate The Florida Senate is the upper house of the Florida Legislature, the State legislature (United States), state legislature of the U.S. state of Florida, the Florida House of Representatives being the lower house. Article III, Section 1 of the C ...

and all of the seats of the

Florida House of Representatives The Florida House of Representatives is the lower house of the Florida Legislature, the State legislature (United States), state legislature of the U.S. state of Florida, the Florida Senate being the upper house. Article III, Section 1 of the C ...

were up for election in 2018. Republicans retained control of both chambers.

Georgia

All of the seats of the

Georgia State Senate The Georgia State Senate is the upper house of the Georgia General Assembly, in the U.S. state of Georgia. The Georgia State Senate and the lower house of the General Assembly, the Georgia House of Representatives, comprise the bicameral leg ...

and the

Georgia House of Representatives The Georgia House of Representatives is the lower house of the Georgia General Assembly (the state legislature) of the U.S. state of Georgia (U.S. state), Georgia. There are currently 180 elected members. Republican Party (United States), Repu ...

were up for election in 2018. Republicans retained control of both chambers.

Hawaii

Half of the seats of the

Hawaii Senate The Hawaii State Senate ( Hawaiian: Ka ‘Aha Kenekoa) is the upper house of the Hawaii State Legislature. It consists of twenty-five members elected from an equal number of constituent districts across the islands and is led by the President ...

and all of the seats of the

Hawaii House of Representatives The Hawaii House of Representatives () is the lower house of the Hawaii State Legislature. Pursuant to Article III, Section 3 of the Constitution of Hawaii, amended during the 1978 Hawaii State Constitutional Convention, 1978 constit ...

were up for election in 2018. Democrats retained control of both chambers.

Idaho

All of the seats of the

Idaho Senate The Idaho State Senate is the upper chamber of the Idaho Legislature. It consists of 35 senators elected to two-year terms, each representing a district of the state. The Senate meets at the Idaho State Capitol in Boise, Idaho. Composition of th ...

and the

Idaho House of Representatives The Idaho House of Representatives is the lower chamber of the Idaho Legislature. It consists of 70 representatives elected to two-year terms. The state is divided into 35 districts, each of which elects two representatives to separate seats. ...

were up for election in 2018. Republicans retained control of both chambers.

Illinois

Two-thirds of the seats of the

Illinois Senate The Illinois Senate is the upper chamber of the Illinois General Assembly, the legislative branch of the government of the State of Illinois in the United States. The body was created by the first state constitution adopted in 1818. Under the ...

and all of the seats of the

Illinois House of Representatives The Illinois House of Representatives is the lower house of the Illinois General Assembly. The body was created by the first Illinois Constitution adopted in 1818. The House under the constitution as amended in 1980 consists of 118 representativ ...

were up for election in 2018. Democrats retained control of both chambers.

Indiana

Half of the seats of the

Indiana Senate The Indiana State Senate is the upper house of the Indiana General Assembly, the state legislature of the U.S. state of Indiana. The Senate is composed of 50 members representing an equal number of constituent districts. Senators serve four-year ...

and all of the seats of the

Indiana House of Representatives The Indiana House of Representatives is the lower house of the Indiana General Assembly, the state legislature of the U.S. state of Indiana. The House is composed of 100 members representing an equal number of constituent districts. House mem ...

were up for election in 2018. Republicans retained control of both chambers.

Iowa

Half of the seats of the

Iowa Senate The Iowa Senate is the upper house of the Iowa General Assembly. There are 50 seats in the Iowa Senate, representing 50 single-member districts across the Iowa, state of Iowa with populations of approximately 60,927 per constituency, . Each Senat ...

and all of the seats of the

Iowa House of Representatives The Iowa House of Representatives is the lower house of the Iowa General Assembly, the upper house being the Iowa Senate. There are 100 seats in the Iowa House of Representatives, representing 100 single-member districts across the state, formed ...

were up for election in 2018. Republicans retained control of both chambers.

Kansas

All of the seats of the

Kansas House of Representatives The Kansas House of Representatives is the lower house of the legislature of the U.S. state of Kansas. Composed of 125 state representatives from districts with roughly equal populations of at least 19,000, its members are responsible for craftin ...

were up for election in 2018; the Republican-controlled

Kansas Senate The Kansas Senate is the upper house of the Kansas Legislature, the state legislature of the U.S. State of Kansas. It is composed of 40 senators elected from single-member districts, each with a population of about 73,000 inhabitants. Members o ...

did not hold regularly scheduled elections in 2018. Republicans retained control of the House of Representatives.

Kentucky

Half of the seats of the

Kentucky Senate The Kentucky Senate is the upper house of the Kentucky General Assembly. The Kentucky Senate is composed of 38 members elected from single-member districts throughout Kentucky, the Commonwealth. There are no term limits for Kentucky senators. T ...

and all of the seats of the

Kentucky House of Representatives The Kentucky House of Representatives is the lower house of the Kentucky General Assembly. It is composed of 100 Representatives elected from single-member districts throughout the Commonwealth. Not more than two counties can be joined to form a ...

were up for election in 2018. Republicans retained control of both chambers.

Maine

All of the seats of the

and the

Maine House of Representatives The Maine House of Representatives is the lower house of the Maine Legislature. The House consists of 151 voting members and three nonvoting members. The voting members represent an equal number of districts across the state and are elected via ...

were up for election in 2018. Democrats gained control of the state senate and retained control of the House of Representatives.

Maryland

All of the seats of the

Maryland Senate The Maryland Senate, sometimes referred to as the Maryland State Senate, is the upper house of the General Assembly, the state legislature of the U.S. state of Maryland. Composed of 47 senators elected from an equal number of constituent single ...

and the

Maryland House of Delegates The Maryland House of Delegates is the lower house of the Maryland General Assembly, legislature of the U.S. state of Maryland. It consists of 141 delegates elected from 47 districts. The House of Delegates Chamber is in the Maryland State House ...

were up for election in 2018. Democrats retained control of both chambers.

Massachusetts

All of the seats of the

Massachusetts Senate The Massachusetts Senate is the upper house of the Massachusetts General Court, the bicameral state legislature of the Commonwealth of Massachusetts. The Senate comprises 40 elected members from 40 single-member senatorial districts in the st ...

and the

Massachusetts House of Representatives The Massachusetts House of Representatives is the lower house of the Massachusetts General Court, the State legislature (United States), state legislature of Massachusetts. It is composed of 160 members elected from 14 counties each divided into ...

were up for election in 2018. Democrats control both chambers, and the governor is a member of the Republican Party. Democrats hold a veto-proof supermajority in the state legislature.

Michigan

All of the seats of the

Michigan Senate The Michigan Senate is the upper house of the Michigan Legislature. Along with the Michigan House of Representatives, it composes the state legislature, which has powers, roles and duties defined by Article IV of the Michigan Constitution, ado ...

and the

Michigan House of Representatives The Michigan House of Representatives is the lower house of the Michigan Legislature. There are 110 members, each of whom is elected from constituencies having approximately 77,000 to 91,000 residents, based on population figures from the 2020 ...

were up for election in 2018. Republicans retained control of both chambers, but Democrats picked up enough seats to break the Republican legislative supermajority.

Minnesota

All of the seats of the

Minnesota House of Representatives The Minnesota House of Representatives is the lower chamber of the U.S. state of Minnesota's Minnesota Legislature, legislature. It operates in conjunction with the Minnesota Senate, the state's upper chamber, to write and pass legislation, whic ...

were up for election in 2018; the Republican-controlled

Minnesota Senate The Minnesota Senate is the upper house of the Minnesota Legislature, Legislature of the U.S. state of Minnesota. At 67 members, half as many as the Minnesota House of Representatives, it is the largest upper house of any State legislature (Unite ...

did not hold regularly scheduled elections in 2018. Democrats won control of the House of Representatives, making Minnesota the only state in the country where each major party controlled one state legislative chamber.

Missouri

Half of the seats of the

Missouri Senate The Missouri Senate is the upper chamber of the Missouri General Assembly. It has 34 members, representing districts with an average population of 181,000. Its members serve four-year terms, with half the seats being up for election every two yea ...

and all of the seats of the

Missouri House of Representatives The Missouri House of Representatives is the lower chamber of the Missouri General Assembly. It has 163 members, representing districts with an average size of 37,000 residents. House members are elected for two-year terms during general elections ...

were up for election in 2018. Republicans retained control of both chambers.

Montana

Half of the seats of the

Montana Senate The Montana State Senate is the upper house of the Montana Legislature, the state legislative branch of the U.S. state of Montana. The body is composed of 50 senators elected for four years. Half of the Senate is up for election every two years. ...

and all of the seats of the

Montana House of Representatives The Montana House of Representatives is, with the Montana Senate, one of the two houses of the Montana Legislature. Composed of 100 members, the House elects its leadership every two years. Composition of the House In the event that the parti ...

were up for election in 2018. Republicans retained control of both chambers.

Nebraska

Nebraska is the only U.S. state with a

unicameral legislature Unicameralism (from ''uni''- "one" + Latin ''camera'' "chamber") is a type of legislature consisting of one house or assembly that legislates and votes as one. Unicameralism has become an increasingly common type of legislature, making up nearly ...

; half of the seats of the

Nebraska Legislature The Nebraska Legislature (also called the Unicameral) is the legislative branch, legislature of the U.S. state of Nebraska. The Legislature meets at the Nebraska State Capitol in Lincoln, Nebraska, Lincoln. With 49 members, known as "senators ...

were up for election in 2018. Nebraska is also unique in that its legislature is officially non-partisan and holds non-partisan elections, although the Democratic and Republican parties each endorse legislative candidates. Republicans maintained control.

Nevada

Half of the seats of the

Nevada Senate The Nevada Senate is the upper house of the Nevada Legislature, the state legislature of U.S. state of Nevada, the lower house being the Nevada Assembly. It currently (2012–2021) consists of 21 members from single-member districts. In the pr ...

and all of the seats of the

Nevada Assembly The Nevada Assembly is the lower house of the Nevada Legislature, the state legislature of the U.S. state of Nevada, the upper house being the Nevada Senate. The body consists of 42 members, elected to two-year terms from single-member distri ...

were up for election in 2018. Democrats retained control of both chambers.

New Hampshire

All of the seats of the

and the

New Hampshire House of Representatives The New Hampshire House of Representatives is the lower house in the New Hampshire General Court, the bicameral State legislature (United States), legislature of the state of New Hampshire. The House of Representatives consists of 400 members com ...

were up for election in 2018. Democrats won control of both chambers.

New Mexico

All of the seats of the

New Mexico House of Representatives The New Mexico House of Representatives () is the lower house of the New Mexico State Legislature. There are 70 members of the House. Each member represents roughly 25,980 residents of New Mexico New Mexico is a state in the South ...

were up for election in 2018; the Democratic-controlled

New Mexico Senate The New Mexico State Senate () is the upper house of the New Mexico State Legislature. The Senate consists of 42 members, with each senator representing an equal number of single-member constituent districts across the state. All senatorial distr ...

did not hold regularly scheduled elections in 2018. Democrats retained control of the House of Representatives.

New York

All of the seats of the

and the

New York State Assembly The New York State Assembly is the lower house of the New York State Legislature, with the New York State Senate being the upper house. There are 150 seats in the Assembly. Assembly members serve two-year terms without term limits. The Ass ...

were up for election in 2018. Democrats won control of the state senate and retained control of the state assembly.

North Carolina

All of the seats of the

North Carolina Senate The North Carolina Senate is the Upper house, upper chamber of the North Carolina General Assembly, which along with the North Carolina House of Representatives—the lower chamber—comprises the state legislature of North Carolina. The Senate ...

and the

North Carolina House of Representatives The North Carolina House of Representatives is one of the two houses of the North Carolina General Assembly. The House is a 120-member body led by a Speaker of the North Carolina House of Representatives, Speaker of the House, who holds powers si ...

were up for election in 2018. Republicans retained control of both chambers, but Democrats won enough seats to break the Republican legislative super-majority.

North Dakota

Half of the seats of the

North Dakota Senate The North Dakota State Senate is the upper house of the North Dakota Legislative Assembly, smaller than the North Dakota House of Representatives. Per the state constitution, North Dakota is divided into between 40 and 54 legislative distri ...

and the

North Dakota House of Representatives The North Dakota House of Representatives is the lower house of the North Dakota Legislative Assembly and is larger than the North Dakota Senate. North Dakota is divided into between 40 and 54 legislative districts apportioned by population as ...

were up for election in 2018. Republicans retained control of both chambers.

Ohio

Half of the seats of the

Ohio Senate The Ohio Senate is the upper house of the Ohio General Assembly. The State Senate, which meets in the Ohio Statehouse in Columbus, first convened in 1803. Senators are elected for four year terms, staggered every two years such that half of t ...

and all of the seats of the

Ohio House of Representatives The Ohio House of Representatives is the lower house of the Ohio General Assembly, the state legislature of the U.S. state of Ohio; the other house of the bicameral legislature being the Ohio Senate. The House of Representatives first met in ...

were up for election in 2018. Republicans retained control of both chambers.

Oklahoma

Half of the seats of the

Oklahoma Senate The Oklahoma Senate is the upper house of the two houses of the Legislature of Oklahoma, the other being the Oklahoma House of Representatives. The total number of senators is set at 48 by the Oklahoma Constitution.Oklahoma House of Representatives The Oklahoma House of Representatives is the lower house of the legislature of the U.S. state of Oklahoma. Its members introduce and vote on bills and resolutions, provide legislative oversight for state agencies, and help to craft the state's ...

were up for election in 2018. Republicans retained control of both chambers.

Oregon

Half of the seats of the

Oregon State Senate The Oregon State Senate is the upper house of the State legislature (United States), statewide legislature for the US state of Oregon. Along with the lower chamber Oregon House of Representatives it makes up the Oregon Legislative Assembly. Ther ...

and all of the seats of the

Oregon House of Representatives The Oregon House of Representatives is the lower house of the Oregon Legislative Assembly, the upper house being the Oregon State Senate. There are 60 members of the House, representing 60 districts across the state, each with a population of ...

were up for election in 2018. Democrats retained control of both chambers.

Pennsylvania

Half of the seats of the

Pennsylvania State Senate The Pennsylvania State Senate is the upper house of the Pennsylvania General Assembly, the Pennsylvania state legislature. The State Senate meets in the State Capitol building in Harrisburg. Senators are elected for four-year terms, stagger ...

and all of the seats of the

Pennsylvania House of Representatives The Pennsylvania House of Representatives is the lower house of the bicameral Pennsylvania General Assembly, the legislature of the U.S. state of Pennsylvania. There are 203 members, elected for two-year terms from single member districts. It ...

were up for election in 2018. Republicans retained control of both chambers, but Democrats picked up enough seats to break the Republican legislative supermajority.

Rhode Island

All of the seats of the

Rhode Island Senate The Rhode Island Senate is the upper house of the Rhode Island General Assembly, the state legislature of the U.S. state of Rhode Island, the lower house being the Rhode Island House of Representatives. It is composed of 38 Senators, each of w ...

and the

Rhode Island House of Representatives The Rhode Island House of Representatives is the lower house of the Rhode Island General Assembly, the state legislature (United States), state legislature of the U.S. state of Rhode Island, the upper house being the Rhode Island Senate. It is ...

were up for election in 2018. Democrats retained control of both chambers.

South Carolina

All of the seats of the

South Carolina House of Representatives The South Carolina House of Representatives is the lower house of the South Carolina General Assembly. It consists of 124 representatives elected to two-year terms at the same time as U.S. congressional elections. Unlike many legislatures, seatin ...

were up for election in 2018; the Republican-controlled

South Carolina Senate The South Carolina State Senate is the upper house of the South Carolina General Assembly, the lower house being the South Carolina House of Representatives. It consists of 46 senators elected from single member districts for four-year terms at ...

did not hold regularly scheduled elections in 2018. Republicans retained control of the House of Representatives.

South Dakota

All of the seats of the

South Dakota Senate The South Dakota Senate is the upper house of the South Dakota Legislature. It consists of 35 members, one representing each legislative district. It meets at the South Dakota State Capitol in Pierre. Composition :''99th Legislature (2025)' ...

and the

South Dakota House of Representatives The South Dakota House of Representatives is the lower house of the South Dakota Legislature. It consists of 70 members, two from each legislative district. Two of the state's 35 legislative districts, Districts 26 and 28, are each subdivided ...

were up for election in 2018. Republicans retained control of both chambers.

Tennessee

Half of the seats of the

Tennessee Senate The Tennessee Senate is the upper house of the U.S. state of Tennessee , Tennessee's state legislature, which is known formally as the Tennessee General Assembly. The Tennessee Senate has the power to pass resolutions concerning essentially any ...

and all of the seats of the

Tennessee House of Representatives The Tennessee House of Representatives is the lower house of the Tennessee General Assembly, the state legislature of the U.S. state of Tennessee. Constitutional requirements According to the state constitution of 1870, this body is to consis ...

were up for election in 2018. Republicans retained control of both chambers.

Texas

Half of the seats of the

Texas Senate The Texas Senate is the upper house of the Texas Legislature, with the Texas House of Representatives functioning as the lower house. Together, they form the State legislature (United States), state legislature of the state of Texas. The Senate ...

and all of the seats of the

Texas House of Representatives The Texas House of Representatives is the lower house of the bicameral Texas Legislature. It consists of 150 members who are elected from single-member districts for two-year terms. There are no Term limits in the United States, term limits. The ...

were up for election in 2018. Republicans retained control of both chambers.

Utah

Half of the seats of the

Utah State Senate The Utah State Senate is the upper house of the Utah State Legislature, the state legislature (US), state legislature of the U.S. state of Utah. The Utah Senate is composed of 29 elected members, each representing one senate district. Each senate ...

and all of the seats of the

Utah House of Representatives The Utah House of Representatives is the lower house of the Utah State Legislature, the state legislature of the U.S. state of Utah. The House is composed of 75 representatives elected from single member constituent districts. Each district cont ...

were up for election in 2018. Republicans retained control of both chambers.

Vermont

All of the seats of the

Vermont Senate The Vermont Senate is the upper house of the Vermont General Assembly, the State legislature (United States), state legislature of the U.S. state of Vermont. The senate consists of 30 members elected from multi-member districts. Each senator repre ...

and the

Vermont House of Representatives The Vermont House of Representatives is the lower house of the Vermont General Assembly, the state legislature of the U.S. state of Vermont. The House comprises 150 members, with each member representing around 4,100 citizens. Representatives a ...

were up for election in 2018. Democrats retained control of both chambers.

Washington

Half of the seats of the

Washington State Senate The Washington State Senate is the upper house of the Washington State Legislature. The body consists of 49 members, each representing a district with a population of nearly 160,000. The State Senate meets at the Washington State Capitol, Legis ...

and all of the seats of the

Washington House of Representatives The Washington House of Representatives is the lower house of the Washington State Legislature, and along with the Washington State Senate makes up the legislature of the U.S. state of Washington. It is composed of 98 Representatives from 49 ...

were up for election in 2018. Democrats had previously flipped control of the Senate in a 2017 special election. Democrats retained control of both chambers.

West Virginia

Half of the seats of the

West Virginia Senate The West Virginia Senate is the upper house of the West Virginia Legislature. There are seventeen senatorial districts. Each district has two senators who serve staggered four-year terms. Although the West Virginia Democratic Party, Democratic P ...

and all of the seats of the

West Virginia House of Delegates The West Virginia House of Delegates is the lower house of the West Virginia Legislature in West Virginia. Only three states—Maryland, Virginia, and West Virginia—refer to their lower house as the House of Delegates. Organization Regular se ...

were up for election in 2018. Republicans retained control of both chambers.

Wisconsin

Half of the seats of the

Wisconsin State Senate The Wisconsin Senate is the upper house of the Wisconsin State Legislature. Together with the Wisconsin State Assembly they constitute the legislative branch of the state of Wisconsin. The powers of the Wisconsin Senate are modeled after those o ...

and all of the seats of the

Wisconsin State Assembly The Wisconsin State Assembly is the lower house of the Wisconsin Legislature. Together with the smaller Wisconsin Senate, the two constitute the legislative branch of the U.S. state of Wisconsin. The Assembly is controlled by the Republican ...

were up for election in 2018. Republicans retained control of both chambers.

Wyoming

Half of the seats of the

Wyoming Senate The Wyoming Senate is the upper house of the Wyoming Legislature, Wyoming State Legislature. There are 31 Senators in the Senate, representing an equal number of constituencies across Wyoming, each with a population of at least 17,000. The Senat ...

and all of the seats of the

Wyoming House of Representatives The Wyoming House of Representatives is the lower house of the Wyoming Legislature, Wyoming State Legislature. There are 62 Representatives in the House, representing an equal number of single-member constituent districts across the Wyoming, st ...

were up for election in 2018. Republicans retained control of both chambers.

Territorial and federal district summaries

American Samoa

All of the seats of the

American Samoa House of Representatives The American Samoa House of Representatives is the lower house of the American Samoa Fono. The House consists of 21 members serving two-year terms, with 20 popularly elected representatives, and one delegate from Swains Island elected in a publ ...

were up for election. Members of the House of Representatives serve two-year terms. Gubernatorial and legislative elections are conducted on a nonpartisan basis in American Samoa.

Guam

All of the seats of the unicameral

Legislature of Guam The Legislature of Guam () is the law-making body for the United States territory of Guam. The unicameral legislative branch consists of fifteen senators, each serving for a two-year term. All members of the legislature are elected at-large with ...

were up for election. All members of the legislature serve a two-year term. Democrats retained control of the legislature.

Northern Mariana Islands

A portion of the seats of the

Northern Mariana Islands Senate The Northern Mariana Islands Senate is the upper house of the Northern Mariana Islands Commonwealth Legislature. The Senate consists of nine senators representing three senatorial districts (Saipan & the Northern Islands, Tinian & Aguijan, a ...

, and all of the seats of the

Northern Mariana Islands House of Representatives The Northern Mariana Islands House of Representatives is the lower house of the Northern Mariana Islands Commonwealth Legislature. In the 2007 election cycle, the CNMI House membership was increased from 18 to 20. Representatives serve two-ye ...

, were up for election. Members of the senate serve either four-year terms, while members of the house serve two-year terms. Republicans maintained control of both chambers.

U.S. Virgin Islands

All of the seats of the unicameral

Legislature of the Virgin Islands The Legislature of the United States Virgin Islands is the territorial legislature of the United States Virgin Islands. The legislative branch of the unincorporated U.S. territory is unicameral, with a single house consisting of 15 senators, e ...

were up for election. All members of the legislature serve a two-year term. Democrats retained control of the legislature.

Washington, D.C.

The

Council of the District of Columbia The Council of the District of Columbia (or simply D.C. Council) is the legislative branch of the government of the District of Columbia. As permitted in the United States Constitution, the district is not part of any U.S. state and is overseen ...

serves as the legislative branch of the

federal district A federal district is a specific administrative division in one of various federations. These districts may be under the direct jurisdiction of a federation's national government, as in the case of federal territory (e.g., India, Malaysia), or the ...

Washington, D.C. Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River, across from Virginia, and shares land borders with ...

Half of the council seats are up for election. Council members serve four-year terms. Democrats retained supermajority control of the council.

Special elections

Various states will hold special elections for legislative districts throughout the year.

Alabama

New Jersey

Notes

References

{{United States legislatures State legislative elections State legislature elections in the United States by year