
Mahoning County
- State:
- Ohio
- County Seat:
- Youngstown
Mahoning County's estimated 2025 population is 224,944 with a growth rate of -0.14% in the past year according to the most recent United States census data. Mahoning County is the 13th largest county in Ohio. The 2010 population was 238,315 and has seen a growth of -5.61% since that time.