McLean County, Kentucky (Formed 1854) Land Area Year Population (sq.mi) Density 2010 9,531 252.5 37.8 2000 9,938 254.3 39.1 1990 9,628 254.3 37.9 1980 10,090 254.3 39.7 1970 9,062 254.3 35.6 1960 9,355 254.3 36.8 1950 10,021 254.3 39.4 1940 11,446 254.3 45.0 1930 11,072 254.3 43.5 1920 12,502 254.3 49.2 1910 13,241 253.0 52.3 1900 12,448 253.0 49.2 1890 9,887 253.0 39.1 1880 9,293 254.8 36.5 1870 7,614 254.8 29.9 1860 6,144 253.8 24.2