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Jefferson County, Kentucky

US county information
NameJefferson County
US Area
Total Area398.58 sq mi (1032.3 km2)
Land Area385.09 sq mi (997.4 km2)
Water Area13.49 sq mi (34.9 km2)
Population Est.741096 (2010)
Density722.2/km2 (1871/sq mi)
Named forThomas Jefferson, President of the United States (1801 1809)
Time zoneEastern
Time zoneEastern: UTC-5/-4: -5/-4

     Home | County | Jefferson County Kentucky

Jefferson County is a county located in the U.S. state of Kentucky. It is the most populous county in Kentucky and is more than twice as populous as the second most populous, Fayette. It was formed in 1780. The population was 741,096 in the 2010 Census.

Jefferson County is the most populous county in the Louisville/Jefferson County, KY IN Metropolitan Statistical Area.

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