
Jefferson County
- State:
- Florida
- County Seat:
- Monticello
Jefferson County's estimated 2025 population is 16,212 with a growth rate of 2.41% in the past year according to the most recent United States census data. Jefferson County is the 60th largest county in Florida. The 2010 population was 14,754 and has seen a growth of 9.88% since that time.