Ohio County, Kentucky (Formed 1799)
                Land Area          
Year  Population  (sq.mi)   Density
2010     23,842     587.3     40.6
2000     22,916     593.8     38.6
1990     21,105     593.8     35.5
1980     21,765     593.8     36.7
1970     18,790     593.8     31.6
1960     17,725     593.8     29.9
1950     20,840     593.8     35.1
1940     24,421     593.8     41.1
1930     24,469     593.8     41.2
1920     26,473     593.8     44.6
1910     27,642     584.0     47.3
1900     27,287     572.0     47.7
1890     22,946     572.0     40.1
1880     19,669     596.5     33.0
1870     15,561     596.5     26.1
1860     12,209     596.8     20.5
1850      9,749     552.4     17.6
1840      6,592     552.4     11.9
1830      4,715     573.8      8.2
1820      3,879     598.9      6.5
1810      3,792   1,240.5      3.1
1800      1,223   1,714.3      0.7