Letcher County, Kentucky (Formed 1842)
                Land Area          
Year  Population  (sq.mi)   Density
2010     24,519     337.9     72.6
2000     25,277     339.0     74.6
1990     27,000     339.1     79.6
1980     30,687     339.1     90.5
1970     23,165     339.1     68.3
1960     30,102     339.1     88.8
1950     39,522     339.1    116.5
1940     40,592     339.1    119.7
1930     35,702     339.1    105.3
1920     24,467     339.1     72.2
1910     10,623     355.0     29.9
1900      9,172     348.0     26.4
1890      6,920     348.0     19.9
1880      6,601     394.9     16.7
1870      4,608     394.9     11.7
1860      3,904     395.7      9.9
1850      2,512     394.9      6.4