USA
> St. Marys, PA Micro Area
| Metropolitan statistical area : | St. Marys, PA Micro Area |
| Land Area : | 827.35 sq mi |
| Water Area : | 4.95 sq mi |
| Latitude : | 41.4273339 |
| Longitude : | -78.6539383 |
| Population (2010): | 31,946 |
| Population Estimate (2012) : | 31,981 |
| Population Density : | 38.61/sq mi |
| Housing Units (2012) : | 17,585 |
| Median Household Income (2012) : | $44,741 (USA : $53,046) |
| Median Family Income (2012) : | $54,363 (USA : $64,585) |
| Median House Price (2012) : | $92,300 (USA : $181,400) |