2000 United States census

Twenty-second census of the United States
← 1990 April 1, 2000 2010 →
U.S. Census Bureau seal
2000 U.S. census logo
General information
Country	United States
Results
Total population	281,421,906 ( 13.2%)
Most populous state	California (33,871,648)
Least populous state	Wyoming (493,782)

The 2000 United States census, conducted by the Census Bureau, determined the resident population of the United States 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.^[1] This was the twenty-second federal census and was at the time the largest civilly administered peacetime effort in the United States.^[2]

Approximately 16 percent of households received a "long form" of the 2000 census, which contained over 100 questions. It would be the last census to include the "long form", since subsequent censuses, starting with the 2010 census, would be "short form" only, with the more detailed questions being replaced by the new American Community Survey.^[3] 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—recorded a population of over 30 million, as well as the first in which two states—California and Texas—recorded populations of more than 20 million.