Marseilles township
- County:
- Wyandot County
- County Seat:
- No
- Area (mi²):
- 24.045
- State:
- Ohio
Marseilles township is located in Wyandot County, Ohio. Marseilles township has a 2026 population of 368. Marseilles township is currently declining at a rate of -0.27% annually and its population has decreased by -3.66% since the most recent census, which recorded a population of 382 in 2020.
The median age in Marseilles township is 51.3 years: 27.5 years for males, and 63.4 years for females. For every 100 females there are 108.5 males.