The United States census of 2000, conducted by the
Census Bureau, determined the resident population of the
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five ma ...
on April 1,
2000, to be 281,421,906, an increase of 13.2 percent over the 248,709,873 people enumerated during the
1990 census. This was the twenty-second federal census and was at the time the largest civilly administered peacetime effort in the United States.
Approximately 16 percent of households received a "long form" of the 2000 census, which contained over 100 questions. Full documentation on the 2000 census, including census forms and a procedural history, is available from the
Integrated Public Use Microdata Series.
This was the first census in which a state –
California
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the ...
– recorded a population of over 30 million, as well as the first in which two states – California and
Texas
Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...
– recorded populations of more than 20 million.
Data availability
Microdata Microdata can mean:
* Microdata (statistics), a statistical term for individual response data in surveys and censuses
* Microdata (HTML), a specification for semantic markup in HTML
* Microdata Corporation
Microdata Corporation was an American ...
from the 2000 census is freely available through the
Integrated Public Use Microdata Series.
Aggregate data for small areas, together with electronic boundary files, can be downloaded from the
National Historical Geographic Information System.
Personally identifiable information will be available in 2072.
State rankings
City rankings
Top 100
Population profile
The U.S. resident population includes the total number of people in the
50 states and the
District of Columbia
)
, image_skyline =
, image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan ...
. The Bureau also enumerated the residents of the
U.S. territory of
Puerto Rico; its population was 3,808,610, an 8.1% increase over the number from a decade earlier.
In an introduction to a more detailed population profile (see
references below), the Census Bureau highlighted the following facts about U.S. population dynamics:
* 75% of respondents said they were
White or Caucasian and no other race;
*
Hispanics accounted for 12.5% of the U.S. population, up from 9% in 1990;
* 12.4% (34.5 million Americans) were of
German descent;
* 12.3% were of Black or
African American
African Americans (also referred to as Black Americans and Afro-Americans) are an Race and ethnicity in the United States, ethnic group consisting of Americans with partial or total ancestry from sub-Saharan Africa. The term "African American ...
descent;
* 3.6% of respondents were
Asian;
* 2.4% (6.8 million Americans) of respondents were
multiracial
Mixed race people are people of more than one race or ethnicity. A variety of terms have been used both historically and presently for mixed race people in a variety of contexts, including ''multiethnic'', ''polyethnic'', occasionally ''bi-ethn ...
(2 or more races). The 2000 census was the first time survey options for multiracial Americans were provided.
* Between 1990 and 2000, the population aged 45 to 54 grew by 49% and those aged 85 and older grew 38%;
* Women outnumbered men two to one among those aged 85 and older;
* Almost one in five adults had some type of
disability in 1997 and the likelihood of having a disability increased with age;
* Families (as opposed to men or women living alone) still dominated
American households, but less so than they did thirty years ago;
* Since 1993, both families and non-families have seen median household incomes rise, with "households headed by a woman without a spouse present" growing the fastest;
* People in married-couple families had the lowest
poverty
Poverty is the state of having few material possessions or little income. Poverty can have diverse social, economic, and political causes and effects. When evaluating poverty in ...
rates;
* The poor of any age were more likely than others to lack
health insurance
Health insurance or medical insurance (also known as medical aid in South Africa) is a type of insurance that covers the whole or a part of the risk of a person incurring medical expenses. As with other types of insurance, risk is shared among ...
coverage;
* The number of
elementary and
high school students in 2000 fell just short of the all-time high of 49 million reached in 1970;
* Improvements in educational attainment cross racial and ethnic lines; and
* The majority (51%) of U.S. households had access to
computers; 42% had
Internet access
Internet access is the ability of individuals and organizations to connect to the Internet using computer terminals, computers, and other devices; and to access services such as email and the World Wide Web. Internet access is sold by Internet ...
.
Changes in population
Regionally, the
South
South is one of the cardinal directions or Points of the compass, compass points. The direction is the opposite of north and is perpendicular to both east and west.
Etymology
The word ''south'' comes from Old English ''sūþ'', from earlier Pro ...
and
West experienced the bulk of the nation's population increase: 14,790,890 and 10,411,850, respectively. This meant that the
mean center of U.S. population moved to
Phelps County, Missouri. The
Northeastern United States
The Northeastern United States, also referred to as the Northeast, the East Coast, or the American Northeast, is a geographic region of the United States. It is located on the Atlantic coast of North America, with Canada to its north, the Sou ...
grew by 2,785,149; the
Midwest
The Midwestern United States, also referred to as the Midwest or the American Midwest, is one of four Census Bureau Region, census regions of the United States Census Bureau (also known as "Region 2"). It occupies the northern central part of ...
by 4,724,144.

(maps not to scale)
Reapportionment

The results of the census are used to determine how many
congressional districts each state is
apportioned. Congress defines the formula, in accordance with Title 2 of the U.S. Code, to reapportion among the states the 435 seats in the
United States House of Representatives
The United States House of Representatives, often referred to as the House of Representatives, the U.S. House, or simply the House, is the lower chamber of the United States Congress, with the Senate being the upper chamber. Together the ...
. The apportionment population consists of the resident population of the fifty states, plus the overseas military and federal civilian employees and their dependents living with them who could be allocated to a state. Each member of the House represents a population of about 647,000. The populations of the District of Columbia and Puerto Rico are excluded from the apportionment population because they do not have voting seats in the U. S. House of Representatives.
Since
the first census in 1790, the decennial count has been the basis for the
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five ma ...
representative form of government. Article I, Section II specifies that "The Number of Representatives shall not exceed one for every thirty Thousand, but each State shall have at Least one Representative." In 1790, each member of the House represented about 34,000 residents. Since then, the House more than quadrupled in size, and in 1911 the
number of representatives was fixed at 435. Today, each member represents about 20 times as many constituents.
Adjustment controversy
In the years leading up to the 2000 census, there was substantial controversy over whether the Bureau should adjust census figures based on a follow-up survey, called the post-enumeration survey, of a sample of blocks. (In 1999, the Supreme Court ruled 5–4 that the Constitution prohibits the use of such figures for apportionment purposes, but it may be permissible for other purposes where feasible.) The controversy was partly technical, but also partly political, since based on data from the 1990 census both parties believed that adjustment would likely have the effect, after redistricting, of slightly increasing Democratic representation in legislative bodies, but would also give Utah an additional, probably Republican, representative to Congress.
Following the census, discrepancies between the adjusted census figures and demographic estimates of population change could not be resolved in time to meet legal deadlines for the provision of redistricting data, and the Census Bureau therefore recommended that the unadjusted results be used for this purpose. This recommendation was followed by the Secretary of Commerce (the official in charge of making the determination).
Utah controversy
After the census was tabulated,
Utah
Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to its ...
challenged the results in two different ways. Utah was extremely close to gaining a fourth congressional seat, falling 857 people short, which in turn was allocated to
North Carolina
North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia a ...
. The margin was later shortened to 80 people, after the federal government discovered that it overcounted the population of North Carolina by 2,673 residents. The Census Bureau counted members of the military and other federal civilian employees serving abroad as residents of their home state but did not count other people living outside the United States. Utah claimed that people traveling abroad as religious missionaries should be counted as residents and that the failure to do so imposed a burden on
Mormon religious practice. Almost half of all Mormon missionaries, more than 11,000 people, were from Utah; only 102 came from North Carolina. If this policy were changed, then Utah would have received an additional seat instead of North Carolina. On November 26, 2002, the Supreme Court affirmed the lower court ruling that rejected Utah's efforts to have Mormon missionaries counted.
The state of Utah then filed another lawsuit alleging that the statistical methods used in computing the state populations were improper and cost Utah the seat. The Bureau uses a method called
imputation to assign a number of residents to addresses where residents cannot be reached after multiple efforts. While nationwide the imputation method added 0.4% to the population, the rate in Utah was 0.2%. The state challenged that the use of imputation violates the Census Act of 1957 and that it also fails the Constitution's requirement in Article I, Section 2 that an "actual enumeration" be used for apportionment. This case, ''
Utah v. Evans'', made it to the
Supreme Court
A supreme court is the highest court within the hierarchy of courts in most legal jurisdictions. Other descriptions for such courts include court of last resort, apex court, and high (or final) court of appeal. Broadly speaking, the decisions of ...
, but Utah was again defeated.
Gay and lesbian controversy

The census forms did not include any questions regarding
sexual orientation, making it impossible to compile data comparing heterosexual and homosexual populations. However, two questions ''were'' asked that allowed same-sex partnerships to be counted. The questionnaires asked the sex of each person in a household and they asked what the relationship was between each of the members of the household. Respondents could check "Husband/wife" or "unmarried partner" or a number of other relationships. Responses were tabulated and the
Census Bureau reported that there were more than 658,000 same-sex couples heading households in the United States. However, only about 25% of gay men and 40% of lesbians are in shared-household partnerships at any one time, according to non-census surveys. For every same-sex couple tallied in the census, there could be three to six more homosexual un-partnered individuals who would not be counted as gay. The census reported that same-sex male couples numbered 336,001 and female same-sex couples numbered 329,522. Extrapolating from those figures and the surveyed partnering habits of homosexuals, as many as 4.3 million homosexual adults could have been living in the U.S. in 2000. The exact number cannot be known because the census did not count them specifically. Bisexual and transgender populations were not counted, either, because there were no questions regarding this information. Also unavailable is the number of additional same-sex couples living under the same roof as the first, though this applies to additional heterosexual couples as well. The lack of accurate numbers makes it difficult for lawmakers who are considering legislation on hate crimes or social services for gay families with children.
It also makes for less accuracy when predicting the fertility of a population.
Another issue that concerned gay rights advocates involved the automatic changing of data during the tabulation process. This automatic software data compiling method, called
''allocation'', was designed to counteract mistakes and discrepancies in returned questionnaires. Forms that were filled out by two same-sex persons who checked the "Husband/wife" relationship box were treated as a discrepancy. The Census Bureau explained that
same-sex "Husband/wife" data samples were changed to "unmarried partner" by computer processing methods in 99% of the cases. In the remaining 1%, computer systems used one of two possibilities: a) one of the two listed sexes was changed, making the partnership appear heterosexual, or b) if the two partners were more than 15 years apart in age, they might have been reassigned into a familial parent/child relationship.
The process of automatic reassignment of same-sex marriage data was initiated so that the Census Bureau would not contravene the
Defense of Marriage Act passed in 1996. The Act states:
With allocation moving married same-sex couples to the unmarried partner category, social scientists lost information that could have been extracted relating to the social stability of a same-gender couple who identify themselves as married.
References
Sources
Constitution Article I Section II re Enumeration and Apportionment
Further reading
* .
External links
United States Census Bureau
Population Profile Introductory slide show in
MS Powerpoint format
State and County QuickFacts the most requested information
for population, housing, economic, and geographic data
2000 United States Census Form2001 U.S Census ReportContains 2000 census results
Other 2000 census websites
MLA Language Mapfrom the
Modern Language Association
The Modern Language Association of America, often referred to as the Modern Language Association (MLA), is widely considered the principal professional association in the United States for scholars of language and literature. The MLA aims to "st ...
How the Census Worksvia Howstuffworks.com
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Census 2000
United States census
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five ma ...