US Population from the Census, Year,Population 1790,3929214 1800,5308483 1810,7239861 1820,9638453 1830,12866020 1840,17069453 1850,23191876 1860,31443321 1870,39818449 1880,50155783 1890,62947714 1900,75994575 1910,91972266 1920,105710620 1930,122775046 1940,131669275 1950,151325798 1960,179323175 1970,203302031 1980,226545805 1990,248718302 2000,281424603 2010,308745538