
Simpson County
- State:
- Mississippi
- County Seat:
- Mendenhall
Simpson County's estimated 2025 population is 25,899 with a growth rate of 0.36% in the past year according to the most recent United States census data. Simpson County is the 34th largest county in Mississippi. The 2010 population was 27,527 and has seen a growth of -5.91% since that time.