Jefferson County Flag

Jefferson County

State:
Kentucky
County Seat:

Jefferson County's estimated 2025 population is 770,242 with a growth rate of -0.12% in the past year according to the most recent United States census data. Jefferson County is the 1st largest county in Kentucky. The 2010 population was 742,096 and has seen a growth of 3.79% since that time.

770,242
Total Population
2,022
Population Density (mi²)
1
Population Rank (State)
-951 -0.12%
Annual Population Growth

Jefferson County Population

Demographics

Economics and Income Statistics