Rocky Hill, NJ Home

The Borough of Rocky Hill is located in Somerset County in the state of New Jersey (NJ).

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Rocky Hill, New Jersey, a Borough, in Somerset County was incorporated in December 18, 1889. spans over 0.622 square miles and has a population of 682 citizens who are all invited to join us here on our site.
Latest Rocky Hill, NJ News:

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County Level News: Somerset County News
State Level News: State of New Jersey News
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Rocky Hill, NJ Map (Interactive)

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Rocky Hill Latitude: 40.4004 Longitude: -74.6407

The Zip Code for Rocky Hill, NJ is: 08553

We also provide additional resources for the rest of Somerset County and the State of New Jersey.

The Borough of Rocky Hill

Facts & Data:

Rocky Hill New Jersey Physical Characteristics:

The Borough of Rocky Hill has an area of 0.6 square miles
  • Land: 0.61922355212355 Sq. Mi. (99.48%)
  • Water: 0.0032092664092664 Sq. Mi.(0.52%)
The Rocky Hill Borough takes up 0.2% of the area of Somerset County.

Map Location Coordinates:

  • Latitude: +40.4003474
  • Longitude: -074.6389221
Rocky Hill Land Water Pie Chart

Rocky Hill, NJ Climate Information:

  • Average Rainfall: 49.11 inches
*Based on annual average for Weather Station USC00280847 BLACKWELLS MILLS
Latitude: 40.4603 Longitude: -74.5825 Elevation: 12.2 feet.

Rocky Hill, NJ Population Data:

According to the 2010 U.S. Census, the population of Rocky Hill was 682 people, which is 0.2 % of the entire population of Somerset County.


  • 50.73% Male
  • 49.27% Female


  • 91.642% White
  • 1.466% Black
  • 2.346% Asian
  • 0.00% American Indian/Alaskan Native
  • 0.00% Pacific Islander
  • 3.079% Mixed
  • 1.466% Other


  • 95.16% Not Hispanic or Latino
  • 4.84% Hispanic or Latino
Rocky Hill Race Population Ring Chart

Rocky Hill, NJ Housing Information:

Average Household Size: 2.4
Number of Residences: 292
  • Occupied: 280 (95.89%)
  • Vacant: 12 (4.11%)
Spotlight Left Rocky Hill Business Spotlight
Radiation Data Inc
873419 - Radon Testing & Correction
PO Box 900, Rocky Hill, New Jersey 08553-0900
J Baicker (609) 466-4300 (609) 466-4302
See more in the Rocky Hill Business Directory
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