- 1980 United States Census
United States Census, conducted by the Census Bureau, determined the resident population of the United Statesto be 226,545,805, an increase of 11.4 percent over the 203,184,772 persons enumerated during the 1970 Census. [cite web |url=http://www2.census.gov/prod2/statcomp/documents/1991-02.pdf |title=Population and Area (Historical Censuses) |publisher=United States Census Bureau]
Between the 1980 census and the 1990 census, the United States' population increased by approximately 22,164,837 or 9.8%. So the 1990 Census is about 244664694 people.
* [http://www.census.gov/population/www/censusdata/hiscendata.html Historic US Census data]
* [http://www2.census.gov/prod2/statcomp/documents/1981-02.pdf 1981 U.S Census Report] Contains 1980 Census results
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