Source: U.S. Census Bureau
| Year Population 2000 281,421,906 1990 248,709,873 1980 226,542,199 1970 203,302,031 1960 179,323,175 1950 151,325,798 1940 132,164,569 1930 123,202,624 1920 106,021,537 1910 92,228,496 1900 76,212,168 1890 62,979,766 1880 50,189,209 1870 38,558,371 1860 31,443,321 1850 23,191,876 1840 17,063,353 1830 12,860,702 1820 9,638,453 1810 7,239,881 1800 5,308,483 1790 3,929,214 |
| Source: U.S. Census Bureau |