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Statistics of U.S. Census Records, 1790-1990
Census Year
U.S. Population
No. of States
No. of Counties
Territories Included in Census

1790 3,929,214 14 292 Southwest (tally only)

1800 5,308,483 16 419 Northwest, IN, & MI

1810 7,239,881 17 574 IL, IN, MI, MS, LA (MO), & Orleans

1820 9,638,453 22 759 AR, MI, & MO

1830 12,860,702 24 988 AR, FL, & MI

1840 17,063,353 26 1,279 IA, FL, & WI

1850 23,191,876 30 1,623 MN, NM, OR, & UT/1851

1860 31,443,321 33 2,080 KS, NM, NE, UT, WA, Indian, & Unorganized Dakota

1870 38,558,371 37 2,295 AZ, CO, ID, NM, MT, UT, WA, WY, Dakota, & Indian

1880 50,189,209 38 2,570 AK, AZ, ID, NM, MT, UT, WA, WY, Dakota, & Indian

1890 62,979,766 44 2,813 AK, AZ, NM, OK, UT, & Indian

1900 76,212,168 45 2,862 AK, AZ, HI, NM, OK, & Indian

1910 92,228,496 46 2,962 AK, AZ, NM, HI, Puerto Rico

1920 106,021,537 48 3,076 AK, HI, Guam, Midway, Canal Zone, Puerto Rico, American Samoa, Virgin, Islands, & Wake Island

1930 123,202,624 48 3,110 AK, HI, Guam, Midway, Canal Zone, Puerto Rico, American Samoa, Virgin, Islands, & Wake Island

1940 132,164,569 48 3,108 AK, HI, Guam, Midway, Canal Zone, Puerto Rico, American Samoa, Virgin, Islands, & Wake Island

1950 151,325,798 48 3,111 AK, HI, Guam, Midway, Canal Zone, Puerto Rico, American Samoa, Virgin, Islands, & Wake Island

1960 179,323,175 50 3,133 Guam, Midway, Canal Zone Puerto Rico, American Samoa, Virgin Islands, & Wake Island

1970 203,211,926 50 3,142 Guam, Midway, Canal Zone Puerto Rico, American Samoa, Virgin Islands, & Wake Island

1980 226,545,805 50 3,137 Guam, Midway, Canal Zone Puerto Rico, American Samoa, Virgin Islands, & Wake Island

1990 248,709,873 50 3,141 Guam, Midway, Canal Zone Puerto Rico, American Samoa, Virgin Islands, & Wake Island