| City : | Williamstown Borough |
| County : | Dauphin County |
| State : | Pennsylvania (PA) |
| | |
| Land Area : | 0.26 sq mi |
| Water Area : | 0.00 sq mi |
| Latitude : | 40.5809219 |
| Longitude : | -76.6169559 |
| | |
| Population (2010): | 1,387 |
| Population Estimate (2012) : | 1,232 |
| Population Density : | 5,350.48/sq mi |
| Housing Units (2012) : | 679 |
| Median Household Income (2012) : | $50,703 (Pennsylvania : $52,267, USA : $53,046) |
| Median Family Income (2012) : | $58,438 (Pennsylvania : $65,980, USA : $64,585) |
| Median House Price (2012) : | $74,400 (Pennsylvania : $164,900, USA : $181,400) |