| Zip Code : | 48880 |
| City : | St. Louis city |
| County : | Isabella County, Midland County, Gratiot County |
| State : | Michigan (MI) |
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| Land Area : | 75.04 sq mi |
| Water Area : | 0.56 sq mi |
| Latitude : | 43.4588640 |
| Longitude : | -84.5783590 |
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| Population (2010): | 10,669 |
| Population Estimate (2012) : | 10,531 |
| Population Density : | 142.18/sq mi |
| Housing Units (2012) : | 2,948 |
| Median Household Income (2012) : | $32,743 (Michigan : $48,471, USA : $53,046) |
| Median Family Income (2012) : | $48,220 (Michigan : $60,749, USA : $64,585) |
| Median House Price (2012) : | $80,700 (Michigan : $128,600, USA : $181,400) |