A Map of County Population Density From 1820 to 2010
Population Density From 1820 to 2010
Pick a Year
Census Year
1820
1830
1840
1850
1860
1870
1880
1890
1900
1910
1920
1930
1940
1950
1960
1970
1980
1990
2000
2010
About this map