Jefferson County KY United States
| County FIPS | 21111 |
| Largest City | Louisville |
| State | Kentucky |
| Latitude | 38.1872 |
| Longitude | -85.6591 |
| Population | 783,022 |
| Density | 2056.63 people per square mile |
| Time Zone | America/New York |
Median household: $69,866
Median individual: $40,316
Mode: 63.1% White
Median house value: $248,692.0
Median: 38.4 years old
With at least college degree: 37.1%
With STEM degree: 43.5%
Never married: 36.3%
Unemployed: 5.2%
All data comes from the SimpleMaps US Counties Database, 2026.
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