U.S. Census, 1980

Twentieth Census of the United States
U.S. Census Bureau Seal
General information
Country	United States
Date taken	April 1, 1980
Total population	226,545,805
Percent change	11.4%
Most populous state	California 23,669,000
Least populous state	Alaska 400,000

The Twentieth United States Census, conducted by the Census Bureau, determined the resident population of the United States to be 226,545,805, an increase of 11.4 percent over the 203,184,772 persons enumerated during the 1970 Census.

The 1980 census collected the following information from all respondents:

It was the first census not to ask for the name of the "head of household."

Approximately 16 percent of households received a "long form" of the 1980 census, which contained over 100 questions. Full documentation on the 1980 census, including census forms and a procedural history, is available from the Integrated Public Use Microdata Series.

Microdata from the 1980 census are 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 2052.

Between the 1980 census and the 1990 census, the United States' population increased by approximately 22,164,837 or 9.8%.