| Zip Code : | 45885 |
| City : | St. Marys city |
| County : | Mercer County, Auglaize County |
| State : | Ohio (OH) |
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| Land Area : | 70.87 sq mi |
| Water Area : | 0.22 sq mi |
| Latitude : | 40.5698632 |
| Longitude : | -84.3906439 |
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| Population (2010): | 12,661 |
| Population Estimate (2012) : | 12,773 |
| Population Density : | 178.66/sq mi |
| Housing Units (2012) : | 5,692 |
| Median Household Income (2012) : | $45,380 (Ohio : $48,246, USA : $53,046) |
| Median Family Income (2012) : | $58,611 (Ohio : $61,163, USA : $64,585) |
| Median House Price (2012) : | $113,200 (Ohio : $133,700, USA : $181,400) |