| City : | St. John City |
| County : | St. Louis County |
| State : | Missouri (MO) |
| Land Area : | 1.42 sq mi |
| Water Area : | 0.00 sq mi |
| Latitude : | 38.7148408 |
| Longitude : | -90.3462645 |
| Population (2010): | 6,517 |
| Population Estimate (2012) : | 6,519 |
| Population Density : | 4,597.48/sq mi |
| Housing Units (2012) : | 2,953 |
| Median Household Income (2012) : | $36,958 (Missouri : $47,333, USA : $53,046) |
| Median Family Income (2012) : | $47,167 (Missouri : $59,395, USA : $64,585) |
| Median House Price (2012) : | $92,000 (Missouri : $138,400, USA : $181,400) |