
McKean County
- State:
- Pennsylvania
- County Seat:
- Smethport
McKean County's estimated 2025 population is 38,919 with a growth rate of -0.76% in the past year according to the most recent United States census data. McKean County is the 53rd largest county in Pennsylvania. The 2010 population was 43,347 and has seen a growth of -10.22% since that time.