
St. Marys township
- County:
- Auglaize County
- County Seat:
- No
- Area (mi²):
- 36.844
- State:
- Ohio
St. Marys township is located in Auglaize County, Ohio. St. Marys township has a 2025 population of 10,959. St. Marys township is currently declining at a rate of -0.23% annually and its population has decreased by -1.3% since the most recent census, which recorded a population of 11,103 in 2020.
The average household income in St. Marys township is $77,075 with a poverty rate of 8.9%. The median age in St. Marys township is 40.1 years: 38.7 years for males, and 41.6 years for females.