List of United States Senators from Iowa
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Iowa Iowa () is a U.S. state, state in the Midwestern United States, Midwestern region of the United States, bordered by the Mississippi River to the east and the Missouri River and Big Sioux River to the west. It is bordered by six states: Wiscon ...
was admitted to the Union on December 28, 1846, and elects
United States senators The United States Senate is the upper chamber of the United States Congress, with the House of Representatives being the lower chamber. Together they compose the national bicameral legislature of the United States. The composition and p ...
to Class 2 and Class 3. The state's current U.S. senators are Republicans
Chuck Grassley Charles Ernest Grassley (born September 17, 1933) is an American politician serving as the president pro tempore emeritus of the United States Senate, and the senior United States senator from Iowa, having held the seat since 1981. In 2022, h ...
(serving since 1981) and
Joni Ernst Joni Kay Ernst (née Culver; born July 1, 1970) is an American former military officer and politician serving as the junior United States senator from Iowa since 2015. A member of the Republican Party, she previously served in the Iowa State Se ...
(serving since 2015).
Chuck Grassley Charles Ernest Grassley (born September 17, 1933) is an American politician serving as the president pro tempore emeritus of the United States Senate, and the senior United States senator from Iowa, having held the seat since 1981. In 2022, h ...
is Iowa's longest-serving senator (since 1981).


List of senators

, - style="height:2em" , rowspan=2 colspan=3 , ''Vacant'' , rowspan=2 nowrap , Dec 28, 1846 –
Dec 7, 1848 , rowspan=2 , Legislature failed to elect. , rowspan=2 , — , , rowspan=2 , — , rowspan=2 , Legislature failed to elect. , rowspan=2 nowrap , Dec 28, 1846 –
Dec 7, 1848 , rowspan=2 colspan=3 , ''Vacant'' , - style="height:2em" , rowspan=2 , - style="height:2em" ! rowspan=9 , 1 , rowspan=9 align=left ,
George W. Jones , rowspan=9 , Democratic , rowspan=9 nowrap , Dec 7, 1848 –
Mar 3, 1859 , rowspan=3 , Elected in 1848. , rowspan=3 , 1 , 1 , Elected in 1848. , rowspan=4 nowrap , Dec 7, 1848 –
Feb 22, 1855 , rowspan=4 , Democratic , rowspan=4 align=right ,
Augustus C. Dodge ! rowspan=4 , 1 , - style="height:2em" , , rowspan=4 , 2 , rowspan=3 , Re-elected in 1849.Resigned to become
U.S. Minister to Spain The incumbent ambassador is Julissa Reynoso Pantaleón, she was sworn in by United States Vice President, Vice President Kamala Harris on January 7, 2022 and presented her credentials on February 2, 2022. This is a list of Ambassadors of the Uni ...
, having lost re-election. , - style="height:2em" , , - style="height:2em" , rowspan=6 , Re-elected in 1852.Lost renomination. , rowspan=6 , 2 , rowspan=2 , - style="height:2em" ,   , nowrap , Feb 22, 1855 –
Mar 3, 1855 , colspan=3 , ''Vacant'' , - style="height:2em" , rowspan=3 , rowspan=5 , 3 , Elected in 1855.Elected invalidated, as the
Iowa Senate The Iowa Senate is the upper house of the Iowa General Assembly, United States. There are 50 seats in the Iowa Senate, representing 50 single-member districts across the state of Iowa with populations of approximately 60,927 per constituency, ...
had not participated in it. , nowrap , Mar 4, 1855 –
Jan 5, 1857 , , Free Soil , align=right ,
James Harlan ! rowspan=8 , 2 , - style="height:2em" ,   , nowrap , Jan 5, 1857 –
Jan 29, 1857 , colspan=2 , ''Vacant'' , - style="height:2em" , rowspan=3 , Re-elected to finish his vacant term. , rowspan=6 nowrap , Jan 29, 1857 –
May 15, 1865 , rowspan=6 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=6 align=right ,
James Harlan , - style="height:2em" , , - style="height:2em" ! rowspan=8 , 2 , rowspan=8 align=left ,
James W. Grimes James Wilson Grimes (October 20, 1816 – February 7, 1872) was an American politician, serving as the third Governor of Iowa and a United States Senator from Iowa. Biography Born in Deering, New Hampshire, Grimes graduated from Hampton Acad ...
, rowspan=8 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=8 nowrap , Mar 4, 1859 –
Dec 6, 1869 , rowspan=3 , Elected in 1858. , rowspan=3 , 3 , , - style="height:2em" , , rowspan=5 , 4 , rowspan=3 , Re-elected in 1860.Resigned to become
U.S. Secretary of the Interior The United States secretary of the interior is the head of the United States Department of the Interior. The secretary and the Department of the Interior are responsible for the management and conservation of most federal land along with natura ...
. , - style="height:2em" , , - style="height:2em" , rowspan=5 , Re-elected in 1864.Resigned due to ill health. , rowspan=7 , 4 , rowspan=3 , - style="height:2em" ,   , nowrap , May 15, 1865 –
Jan 13, 1866 , colspan=3 , ''Vacant'' , - style="height:2em" , Elected to finish Harlan's term.Lost nomination for the next term. , nowrap , Jan 13, 1866 –
Mar 3, 1867 , ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, align=right ,
Samuel J. Kirkwood ! 3 , - style="height:2em" , , rowspan=5 , 5 , rowspan=5 , Elected in 1866.Lost re-election. , rowspan=5 nowrap , Mar 4, 1867 –
Mar 3, 1873 , rowspan=5 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=5 align=right ,
James Harlan ! rowspan=5 , 4 , - style="height:2em" , rowspan=3 , - style="height:2em" , colspan=3 , ''Vacant'' , nowrap , Dec 6, 1869 –
Jan 18, 1870 ,   , - style="height:2em" ! 3 , align=left ,
James B. Howell , ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, nowrap , Jan 18, 1870 –
Mar 3, 1871 , Elected to finish Grimes's term.Retired. , - style="height:2em" ! rowspan=3 , 4 , rowspan=3 align=left ,
George G. Wright George Grover Wright (March 24, 1820January 11, 1896) was a pioneer lawyer, Iowa Supreme Court justice, law professor, and Republican United States Senator from Iowa. Born in Bloomington, Indiana, he attended private schools and graduated from In ...
, rowspan=3 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=3 nowrap , Mar 4, 1871 –
Mar 3, 1877 , rowspan=3 , Elected in 1870.Retired. , rowspan=3 , 5 , , - style="height:2em" , , rowspan=3 , 6 , rowspan=3 , Elected in 1872. , rowspan=21 nowrap , Mar 4, 1873 –
Aug 4, 1908 , rowspan=21 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=21 align=right ,
William B. Allison William Boyd Allison (March 2, 1829 – August 4, 1908) was an American politician. An early leader of the Iowa Republican Party, he represented northeastern Iowa in the United States House of Representatives before representing his state in th ...
! rowspan=21 , 5 , - style="height:2em" , , - style="height:2em" ! rowspan=3 , 5 , rowspan=3 align=left ,
Samuel J. Kirkwood , rowspan=3 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=3 nowrap , Mar 4, 1877 –
Mar 7, 1881 , rowspan=3 , Elected in 1876 or 1877.Resigned to become
U.S. Secretary of the Interior The United States secretary of the interior is the head of the United States Department of the Interior. The secretary and the Department of the Interior are responsible for the management and conservation of most federal land along with natura ...
. , rowspan=4 , 6 , , - style="height:2em" , , rowspan=4 , 7 , rowspan=4 , Re-elected in 1878. , - style="height:2em" , rowspan=2 , - style="height:2em" ! 6 , align=left ,
James W. McDill James Wilson McDill (March 4, 1834February 28, 1894) was an American lawyer, state-court judge, Republican Party (United States), Republican United States Representative and United States Senate, Senator from Iowa, state railroad commissioner, ...
, ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, nowrap , Mar 8, 1881 –
Mar 3, 1883 , Appointed to continue Kirkwood's term. Elected in 1882 to finish Kirkwood's term.Retired. , - style="height:2em" ! rowspan=6 , 7 , rowspan=6 align=left ,
James F. Wilson James Falconer "Jefferson Jim" Wilson (October 19, 1828April 22, 1895) was an American lawyer and politician. He served as a Republican U.S. Congressman from Iowa's 1st congressional district during the American Civil War, and later as a two- ...
, rowspan=6 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=6 nowrap , Mar 4, 1883 –
Mar 3, 1895 , rowspan=3 , Elected in 1882. , rowspan=3 , 7 , , - style="height:2em" , , rowspan=3 , 8 , rowspan=3 , Re-elected in 1884. , - style="height:2em" , , - style="height:2em" , rowspan=3 , Re-elected in 1888.Retired. , rowspan=3 , 8 , , - style="height:2em" , , rowspan=3 , 9 , rowspan=3 , Re-elected in 1890. , - style="height:2em" , , - style="height:2em" ! rowspan=3 , 8 , rowspan=3 align=left ,
John H. Gear , rowspan=3 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=3 nowrap , Mar 4, 1895 –
Jul 14, 1900 , rowspan=3 , Elected in 1894. Re-elected in 1900, but died. , rowspan=5 , 9 , , - style="height:2em" , , rowspan=5 , 10 , rowspan=5 , Re-elected in 1896. , - style="height:2em" , rowspan=3 , - style="height:2em" , colspan=3 , ''Vacant'' , nowrap , Jul 14, 1900 –
Aug 22, 1900 ,   , - style="height:2em" ! rowspan=8 , 9 , rowspan=8 align=left ,
Jonathan P. Dolliver Jonathan Prentiss Dolliver (February 6, 1858October 15, 1910) was a Republican orator, U.S. Representative, then U.S. Senator from Iowa at the turn of the 20th century.Thomas Richard Ross, ''Jonathan Prentiss Dolliver: A Study in Political Int ...
, rowspan=8 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=8 nowrap , Aug 22, 1900 –
Oct 15, 1910 , Appointed to finish Gear's term. , - style="height:2em" , rowspan=3 , Appointed to begin the vacant term. Elected in 1902 to finish the vacant term. , rowspan=3 , 10 , , - style="height:2em" , , rowspan=5 , 11 , rowspan=3 , Re-elected in 1902.Clark, p. 247: Allison 119 votes, E. H. Thayer (Democratic) 20 votes.Renominated in 1908 but died before the general election. , - style="height:2em" , , - style="height:2em" , rowspan=4 , Re-elected in 1907.Died. , rowspan=8 , 11 , rowspan=3 , - style="height:2em" ,   , nowrap , Aug 4, 1908 –
Nov 24, 1908 , colspan=3 , ''Vacant'' , - style="height:2em" , Elected to finish Allison's term. , rowspan=16 nowrap , Nov 24, 1908 –
Jul 30, 1926 , rowspan=16 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=16 align=right ,
Albert B. Cummins ! rowspan=16 , 6 , - style="height:2em" , rowspan=3 , rowspan=6 , 12 , rowspan=6 , Re-elected in 1909. , - style="height:2em" , colspan=3 , ''Vacant'' , nowrap , Oct 15, 1910 –
Nov 12, 1910 ,   , - style="height:2em" ! rowspan=2 , 10 , rowspan=2 align=left ,
Lafayette Young , rowspan=2 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=2 nowrap , Nov 12, 1910 –
Apr 11, 1911 , rowspan=2 , Appointed to continue Dolliver's term.Lost election to finish Dolliver's term. , - style="height:2em" , rowspan=2 , - style="height:2em" ! rowspan=6 , 11 , rowspan=6 align=left ,
William S. Kenyon , rowspan=6 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=6 nowrap , Apr 12, 1911 –
Feb 24, 1922 , rowspan=1 , Elected to finish Dolliver's term. , - style="height:2em" , rowspan=3 , Re-elected in 1913. , rowspan=3 , 12 , , - style="height:2em" , , rowspan=3 , 13 , rowspan=3 , Re-elected in 1914. , - style="height:2em" , , - style="height:2em" , rowspan=2 , Re-elected in 1918.Resigned to become Judge of the U.S. Court of Appeals. , rowspan=5 , 13 , , - style="height:2em" , rowspan=3 , rowspan=8 , 14 , rowspan=6 , Re-elected in 1920.Lost renomination, then died. , - style="height:2em" ! 12 , align=left ,
Charles A. Rawson , ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, nowrap , Feb 24, 1922 –
Dec 1, 1922 , Appointed to continue Kenyon's term.Retired when his successor was elected. , - style="height:2em" ! rowspan=3 , 13 , rowspan=3 align=left ,
Smith W. Brookhart Smith Wildman Brookhart (February 2, 1869November 15, 1944), was twice elected as a Republican to represent Iowa in the United States Senate. He was considered an "insurgent" within the Republican Party. His criticisms of the Harding and the ...
, rowspan=3 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=3 nowrap , Dec 1, 1922 –
Apr 12, 1926 , rowspan=2 , Elected to finish Kenyon's term. , - style="height:2em" , , - style="height:2em" , Re-elected in 1924.Lost election challenge. , rowspan=6 , 14 , rowspan=4 , - style="height:2em" ! rowspan=5 , 14 , rowspan=5 align=left ,
Daniel F. Steck , rowspan=5 , Democratic , rowspan=5 nowrap , Apr 12, 1926 –
Mar 3, 1931 , rowspan=5 , Successfully challenged his predecessor's election.Lost re-election. , - style="height:2em" ,   , nowrap , Jul 30, 1926 –
Aug 7, 1926 , colspan=3 , ''Vacant'' , - style="height:2em" , Appointed to continue Cummins's term. Elected in 1926 to finish Cummins's term.Retired. , nowrap , Aug 7, 1926 –
Mar 3, 1927 , ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, align=right ,
David W. Stewart David Wallace Stewart (January 22, 1887February 10, 1974) served as a United States senator from Iowa from August 7, 1926, until March 3, 1927, serving out the unexpired term of a senator who died soon after he was defeated for re-election in a R ...
! 7 , - style="height:2em" , , rowspan=3 , 15 , rowspan=3 , Elected in 1926.Lost renomination and then lost re-election as an Independent. , rowspan=3 nowrap , Mar 4, 1927 –
Mar 3, 1933 , rowspan=3 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=3 align=right ,
Smith W. Brookhart Smith Wildman Brookhart (February 2, 1869November 15, 1944), was twice elected as a Republican to represent Iowa in the United States Senate. He was considered an "insurgent" within the Republican Party. His criticisms of the Harding and the ...
! rowspan=3 , 8 , - style="height:2em" , , - style="height:2em" ! rowspan=5 , 15 , rowspan=5 align=left ,
Lester J. Dickinson Lester Jesse ("L. J." or "Dick") Dickinson (October 29, 1873June 4, 1968) was a Republican United States Representative and Senator from Iowa. He was, in the words of ''Time'' magazine, "a big, friendly, white-thatched Iowa lawyer."
, rowspan=5 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=5 nowrap , Mar 4, 1931 –
Jan 3, 1937 , rowspan=5 , Elected in 1930.Lost re-election. , rowspan=5 , 15 , , - style="height:2em" , , rowspan=5 , 16 , rowspan=2 , Elected in 1932.Died. , rowspan=2 nowrap , Mar 4, 1933 –
Jul 16, 1936 , rowspan=2 , Democratic , rowspan=2 align=right ,
Richard L. Murphy Richard Louis Murphy (November 6, 1875July 16, 1936) of Dubuque, Iowa was a Democratic U.S. Senator from Iowa. Elected with President Franklin D. Roosevelt in 1932, as only the second Democratic Senator from Iowa elected since 1858, Murphy's s ...
! rowspan=2 , 9 , - style="height:2em" , rowspan=3 , - style="height:2em" ,   , nowrap , Jul 16, 1936 –
Nov 3, 1936 , colspan=3 , ''Vacant'' , - style="height:2em" , rowspan=2 , Elected to finish Murphy's term. , rowspan=5 nowrap , Nov 3, 1936 –
Jan 3, 1945 , rowspan=5 , Democratic , rowspan=5 align=right ,
Guy Gillette Guy Mark Gillette (February 3, 1879March 3, 1973) was an American politician serving as a Democratic U.S. Representative and Senator from Iowa. In the U.S. Senate, Gillette was elected, re-elected, defeated, elected again, and defeated again. ...
! rowspan=5 , 10 , - style="height:2em" ! rowspan=3 , 16 , rowspan=3 align=left ,
Clyde L. Herring , rowspan=3 , Democratic , rowspan=3 nowrap , Jan 3, 1937 –
Jan 3, 1943 , rowspan=3 , Elected in 1936.
Didn't take seat until Jan 15, 1937 in order to remain
Governor of Iowa A governor is an administrative leader and head of a polity or political region, ranking under the head of state and in some cases, such as governors-general, as the head of state's official representative. Depending on the type of political r ...
.Lost re-election. , rowspan=3 , 16 , , - style="height:2em" , , rowspan=3 , 17 , rowspan=3 , Re-elected in 1938.Lost re-election. , - style="height:2em" , , - style="height:2em" , - style="height:2em" ! rowspan=3 , 17 , rowspan=3 align=left ,
George A. Wilson George Allison Wilson (April 1, 1884 – September 8, 1953) was an American politician and lawyer. He was a United States Senate, United States Senator and List of Governors of Iowa, 28th Governor of Iowa. Personal background Born on a farm near ...
, rowspan=3 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=3 nowrap , Jan 3, 1943 –
Jan 3, 1949 , rowspan=3 , Elected in 1942.
Didn't take seat until Jan 14, 1943 in order to remain
Governor of Iowa A governor is an administrative leader and head of a polity or political region, ranking under the head of state and in some cases, such as governors-general, as the head of state's official representative. Depending on the type of political r ...
.Lost re-election. , rowspan=3 , 17 , , - style="height:2em" , , rowspan=3 , 18 , rowspan=3 , Elected in 1944. , rowspan=12 nowrap , Jan 3, 1945 –
Jan 3, 1969 , rowspan=12 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=12 align=right ,
Bourke B. Hickenlooper Bourke Blakemore Hickenlooper (July 21, 1896 – September 4, 1971), was an American politician and member of the Republican Party, first elected to statewide office in Iowa as lieutenant governor, serving from 1939 to 1943 and then as the 29 ...
! rowspan=12 , 11 , - style="height:2em" , , - style="height:2em" ! rowspan=3 , 18 , rowspan=3 align=left ,
Guy Gillette Guy Mark Gillette (February 3, 1879March 3, 1973) was an American politician serving as a Democratic U.S. Representative and Senator from Iowa. In the U.S. Senate, Gillette was elected, re-elected, defeated, elected again, and defeated again. ...
, rowspan=3 , Democratic , rowspan=3 nowrap , Jan 3, 1949 –
Jan 3, 1955 , rowspan=3 , Elected in 1948.Lost re-election. , rowspan=3 , 18 , , - style="height:2em" , , rowspan=3 , 19 , rowspan=3 , Re-elected in 1950. , - style="height:2em" , , - style="height:2em" ! rowspan=3 , 19 , rowspan=3 align=left ,
Thomas E. Martin , rowspan=3 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=3 nowrap , Jan 3, 1955 –
Jan 3, 1961 , rowspan=3 , Elected in 1954.Retired. , rowspan=3 , 19 , , - style="height:2em" , , rowspan=3 , 20 , rowspan=3 , Re-elected in 1956. , - style="height:2em" , , - style="height:2em" ! rowspan=6 , 20 , rowspan=6 align=left ,
Jack Miller , rowspan=6 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=6 nowrap , Jan 3, 1961 –
Jan 3, 1973 , rowspan=3 , Elected in 1960. , rowspan=3 , 20 , , - style="height:2em" , , rowspan=3 , 21 , rowspan=3 , Re-elected in 1962Retired. , - style="height:2em" , , - style="height:2em" , rowspan=3 , Re-elected in 1966.Lost re-election. , rowspan=3 , 21 , , - style="height:2em" , , rowspan=3 , 22 , rowspan=3 , Elected in 1968.Retired. , rowspan=3 nowrap , Jan 3, 1969 –
Jan 3, 1975 , rowspan=3 , Democratic , rowspan=3 align=right ,
Harold Hughes Harold Everett Hughes (February 10, 1922 – October 23, 1996) was the 36th Governor of Iowa from 1963 until 1969, and a United States senator from Iowa from 1969 until 1975. He began his political career as a Republican but changed his affi ...
! rowspan=3 , 12 , - style="height:2em" , , - style="height:2em" ! rowspan=3 , 21 , rowspan=3 align=left ,
Dick Clark Richard Wagstaff Clark (November 30, 1929April 18, 2012) was an American radio and television personality, television producer and film actor, as well as a cultural icon who remains best known for hosting '' American Bandstand'' from 1956 to 19 ...
, rowspan=3 , Democratic , rowspan=3 nowrap , Jan 3, 1973 –
Jan 3, 1979 , rowspan=3 , Elected in 1972.Lost re-election. , rowspan=3 , 22 , , - style="height:2em" , , rowspan=3 , 23 , rowspan=3 , Elected in 1974.Lost re-election. , rowspan=3 nowrap , Jan 3, 1975 –
Jan 3, 1981 , rowspan=3 , Democratic , rowspan=3 align=right ,
John Culver John Chester Culver (August 8, 1932 – December 26, 2018) was an American politician, writer and lawyer who was elected to both the United States House of Representatives (1965–1975) and United States Senate (1975–1981) from Iowa. A memb ...
! rowspan=3 , 13 , - style="height:2em" , , - style="height:2em" ! rowspan=3 , 22 , rowspan=3 align=left ,
Roger Jepsen Roger William Jepsen (December 23, 1928 – November 13, 2020) was an American politician from the state of Iowa. A Republican, he served in the United States Senate and as Lieutenant Governor of Iowa. Early life Jepsen was born on Decemb ...
, rowspan=3 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=3 nowrap , Jan 3, 1979 –
Jan 3, 1985 , rowspan=3 , Elected in 1978.Lost re-election. , rowspan=3 , 23 , , - style="height:2em" , , rowspan=3 , 24 , rowspan=3 , Elected in 1980. , rowspan=24 nowrap , Jan 3, 1981 –
Present , rowspan=24 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=24 align=right ,
Chuck Grassley Charles Ernest Grassley (born September 17, 1933) is an American politician serving as the president pro tempore emeritus of the United States Senate, and the senior United States senator from Iowa, having held the seat since 1981. In 2022, h ...
! rowspan=24 , 14 , - style="height:2em" , , - style="height:2em" ! rowspan=15 , 23 , rowspan=15 align=left ,
Tom Harkin Thomas Richard Harkin (born November 19, 1939) is an American lawyer, author, and politician who served as a United States senator from Iowa from 1985 to 2015. A member of the Democratic Party, he previously was the U.S. representative for Io ...
, rowspan=15 , Democratic , rowspan=15 nowrap , Jan 3, 1985 –
Jan 3, 2015 , rowspan=3 , Elected in 1984. , rowspan=3 , 24 , , - style="height:2em" , , rowspan=3 , 25 , rowspan=3 , Re-elected in 1986. , - style="height:2em" , , - style="height:2em" , rowspan=3 , Re-elected in 1990. , rowspan=3 , 25 , , - style="height:2em" , , rowspan=3 , 26 , rowspan=3 , Re-elected in 1992. , - style="height:2em" , , - style="height:2em" , rowspan=3 , Re-elected in 1996. , rowspan=3 , 26 , , - style="height:2em" , , rowspan=3 , 27 , rowspan=3 , Re-elected in 1998. , - style="height:2em" , , - style="height:2em" , rowspan=3 , Re-elected in 2002. , rowspan=3 , 27 , , - style="height:2em" , , rowspan=3 , 28 , rowspan=3 , Re-elected in 2004. , - style="height:2em" , , - style="height:2em" , rowspan=3 , Re-elected in 2008Retired. , rowspan=3 , 28 , , - style="height:2em" , , rowspan=3 , 29 , rowspan=3 , Re-elected in 2010. , - style="height:2em" , , - style="height:2em" ! rowspan=6 , 24 , rowspan=6 align=left ,
Joni Ernst Joni Kay Ernst (née Culver; born July 1, 1970) is an American former military officer and politician serving as the junior United States senator from Iowa since 2015. A member of the Republican Party, she previously served in the Iowa State Se ...
, rowspan=6 ,
Republican Republican can refer to: Political ideology * An advocate of a republic, a type of government that is not a monarchy or dictatorship, and is usually associated with the rule of law. ** Republicanism, the ideology in support of republics or agains ...
, rowspan=6 nowrap , Jan 3, 2015 –
Present , rowspan=3 , Elected in 2014. , rowspan=3 , 29 , , - style="height:2em" , , rowspan=3 , 30 , rowspan=3 , Re-elected in 2016. , - style="height:2em" , , - style="height:2em" , rowspan=3 , Re-elected in 2020. , rowspan=3 , 30 , , - style="height:2em" , , rowspan=3, 31 , rowspan=3, Re-elected in 2022. , - style="height:2em" , , - style="height:2em" , rowspan=2 colspan=5 , To be determined in the 2026 election. , rowspan=2 , 31 , , - style="height:2em" , , 32 , colspan=5 , To be determined in the 2028 election.


See also

* List of United States representatives from Iowa *
United States congressional delegations from Iowa Since Iowa became a U.S. state in 1846, it has sent congressional delegations to the United States Senate and United States House of Representatives. Each state elects two senators to serve for six years, and members of the House to two-year terms. ...
*
Elections in Iowa The number of elections in Iowa varies from year to year. Presidential elections are held every four years. Since 1972, Iowa has been the first state to vote in presidential primaries, with their cau ...


Notes


References

* * {{IA-FedRep
United States senators The United States Senate is the upper chamber of the United States Congress, with the House of Representatives being the lower chamber. Together they compose the national bicameral legislature of the United States. The composition and p ...
Iowa Iowa () is a U.S. state, state in the Midwestern United States, Midwestern region of the United States, bordered by the Mississippi River to the east and the Missouri River and Big Sioux River to the west. It is bordered by six states: Wiscon ...