| Year | Total Population |
|---|---|
| Data from United States Census Bureau | |
| 2010 | 308,745,538 |
| 2000 | 285,230,516 |
| 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 |