
Wyandot County
- State:
- Ohio
- County Seat:
- Upper Sandusky
Wyandot County's estimated 2025 population is 21,267 with a growth rate of -0.44% in the past year according to the most recent United States census data. Wyandot County is the 82nd largest county in Ohio. The 2010 population was 22,587 and has seen a growth of -5.84% since that time.