Simpson County, Kentucky (Formed 1819) Land Area Year Population (sq.mi) Density 2010 17,327 234.2 74.0 2000 16,405 236.2 69.5 1990 15,145 236.2 64.1 1980 14,673 236.2 62.1 1970 13,054 236.2 55.3 1960 11,548 236.2 48.9 1950 11,678 236.2 49.4 1940 11,752 236.2 49.8 1930 11,336 236.2 48.0 1920 11,150 236.2 47.2 1910 11,460 216.0 53.1 1900 11,624 190.0 61.2 1890 10,878 190.0 57.3 1880 10,641 232.0 45.9 1870 9,573 232.0 41.3 1860 8,146 175.9 46.3 1850 7,733 174.4 44.3 1840 6,537 175.9 37.2 1830 5,815 175.9 33.1 1820 4,852 280.8 17.3