Barren County, Kentucky (Formed 1799)
                Land Area          
Year  Population  (sq.mi)   Density
2010     42,173     487.5     86.5
2000     38,033     491.0     77.5
1990     34,001     491.0     69.2
1980     34,009     491.0     69.3
1970     28,677     491.0     58.4
1960     28,303     491.0     57.6
1950     28,461     491.0     58.0
1940     27,559     491.0     56.1
1930     25,844     491.0     52.6
1920     25,356     491.0     51.6
1910     25,293     485.0     52.2
1900     23,197     490.0     47.3
1890     21,490     490.0     43.9
1880     22,321     490.4     45.5
1870     17,780     490.4     36.3
1860     16,665     491.5     33.9
1850     20,240     618.8     32.7
1840     17,288     626.1     27.6
1830     15,079     626.1     24.1
1820     10,328     594.3     17.4
1810     11,286     976.1     11.6
1800      4,784     976.9      4.9