USA
> California > Zip Code 94561
| Zip Code : | 94561 |
| City : | Antioch city, Knightsen, Oakley city |
| County : | Contra Costa County |
| State : | California (CA) |
| Land Area : | 16.93 sq mi |
| Water Area : | 0.98 sq mi |
| Latitude : | 37.9939360 |
| Longitude : | -121.6911387 |
| Population (2010): | 36,515 |
| Population Estimate (2012) : | 36,908 |
| Population Density : | 2,157.29/sq mi |
| Housing Units (2012) : | 12,080 |
| Median Household Income (2012) : | $75,605 (California : $61,400, USA : $53,046) |
| Median Family Income (2012) : | $78,993 (California : $69,883, USA : $64,585) |
| Median House Price (2012) : | $241,400 (California : $383,900, USA : $181,400) |