| City : | Williamstown |
| County : | Gloucester County |
| State : | New Jersey (NJ) |
| | |
| Land Area : | 7.42 sq mi |
| Water Area : | 0.00 sq mi |
| Latitude : | 39.6841129 |
| Longitude : | -74.9688194 |
| | |
| Population (2010): | 15,567 |
| Population Estimate (2012) : | 15,256 |
| Population Density : | 2,098.22/sq mi |
| Housing Units (2012) : | 5,857 |
| Median Household Income (2012) : | $64,269 (New Jersey : $71,637, USA : $53,046) |
| Median Family Income (2012) : | $78,359 (New Jersey : $87,389, USA : $64,585) |
| Median House Price (2012) : | $219,700 (New Jersey : $337,900, USA : $181,400) |