Lyon County, Kentucky (Formed 1854) Land Area Year Population (sq.mi) Density 2010 8,314 213.8 38.9 2000 8,080 215.7 37.5 1990 6,624 215.8 30.7 1980 6,490 215.8 30.1 1970 5,562 215.8 25.8 1960 5,924 215.8 27.5 1950 6,853 215.8 31.8 1940 9,067 215.8 42.0 1930 8,530 215.8 39.5 1920 8,795 215.8 40.8 1910 9,423 277.0 34.0 1900 9,319 226.0 41.2 1890 7,628 226.0 33.8 1880 6,768 254.3 26.6 1870 6,233 254.3 24.5 1860 5,307 253.9 20.9