| Name | Jefferson County |
| State | Kentucky |
| FIPS Code | 21111 |
| County Seat | Louisville |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2024) | 783,381 |
| Population Growth Rate(2020-2024) | 0.05% |
| Majority Ethnicity | White 66.55% |
| Public School Majority Ethnicity | White 38% |
| Partisan Voting Index | Democratic:+8 |
| Unemployment Rate (May 2026) | 4.9% |
| Sales Tax Rate (2025) | 6% |
| Area Code(s) | 502 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 66.55% |
| African American | 22.37% |
| Hispanic | 7.98% |
| Asian | 2.96% |
| Native American | 0.09% |
| Hawaiin/Pacific Islander | 0.04% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 37.64% |
| African American | 36.49% |
| Hispanic | 14.81% |
| Asian | 4.83% |
| Native American | 0.13% |
| Hawaiin/Pacific Islander | 0.14% |