| City : | Rocky Hill Borough |
| County : | Cass County, Somerset County, Sussex County |
| State : | New Jersey (NJ) |
| | |
| Land Area : | 0.62 sq mi |
| Water Area : | 0.00 sq mi |
| Latitude : | 40.4003475 |
| Longitude : | -74.6389222 |
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| Population (2010): | 682 |
| Population Estimate (2012) : | 546 |
| Population Density : | 1,101.38/sq mi |
| Housing Units (2012) : | 292 |
| Median Household Income (2012) : | $90,208 (New Jersey : $71,637, USA : $53,046) |
| Median Family Income (2012) : | $115,000 (New Jersey : $87,389, USA : $64,585) |
| Median House Price (2012) : | $443,300 (New Jersey : $337,900, USA : $181,400) |