Floyd County, Kentucky (Formed 1800) Land Area Year Population (sq.mi) Density 2010 39,451 393.3 100.3 2000 42,441 394.3 107.6 1990 43,586 394.3 110.5 1980 48,764 394.3 123.7 1970 35,889 394.3 91.0 1960 41,642 394.3 105.6 1950 53,500 394.3 135.7 1940 52,986 394.3 134.4 1930 41,942 394.3 106.4 1920 27,427 394.3 69.6 1910 18,623 399.0 46.7 1900 15,552 387.0 40.2 1890 11,256 387.0 29.1 1880 10,176 470.8 21.6 1870 7,877 470.8 16.7 1860 6,388 469.0 13.6 1850 5,714 501.5 11.4 1840 6,302 607.3 10.4 1830 4,347 607.6 7.2 1820 8,207 3,060.1 2.7 1810 3,485 3,106.1 1.1