What is the population of Rocky Hill?

The population of Rocky Hill, NJ is 666.

Where is Rocky Hill located?

Rocky Hill, NJ is located at latitude 40.3998300 and longitude -74.6343200. It is in United States.

What is the area of Rocky Hill?

The area of Rocky Hill, NJ is 1.590421 km².

What is the elevation of Rocky Hill?

Rocky Hill, NJ has an elevation of 26 meters (85 feet) above sea level.

What time zone is Rocky Hill in?

Rocky Hill, NJ is in the America/New_York time zone.

What state is Rocky Hill in?

Rocky Hill is in the state of New Jersey, United States.

What county is Rocky Hill, NJ in?

Rocky Hill is in Somerset County, New Jersey.

How has the population of Rocky Hill changed?

The population of Rocky Hill, NJ has decreased from 682 (2010) to 666 (2020), a change of -2.3%.

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Rocky Hill, New Jersey

Rocky Hill: borough in Somerset County, New Jersey

About

Rocky Hill is a city located in the county of Somerset in the U.S. state of New Jersey. Its population at the 2010 census was 682 and a population density of 429 people per km². After 10 years in 2020 city had an estimated population of 666 inhabitants.

The city was created 136 years ago in 1889.

Rocky Hill locator map — Location of Rocky Hill on New Jersey map.

Quick Facts about Rocky Hill

Population	666 (2020)
Country	United States of America
State	New Jersey (United States)
County	Somerset County
Postal code	08553
Area	1.59 km²
Has part	Rocky Hill Historic District
Latitude & Longitude	40.3998,-74.6343
Altitude	354 feet / 108 meters
Establishment	December 18, 1889 (136 years ago)
Time Zone	Eastern Time Zone
Local time	01:21:42 (16th April 2026)
Density	419 Pop. per km² as of 2020
Population growth	-2.4% (2010-2020)
Weather	83℉ Partly Sunny 7-days weather

91 Washington Street Rocky Hill NJ - historic Dutch Reformed Church image

Geography

Rocky Hill is located at 40°23'59"N 74°38'4"W (40.3998300, -74.6343200).

Rocky Hill map

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Weather

83°F

Partly Sunny

5 to 10 mph W Thursday

Partly sunny, with a high near 83.

7-Day Forecast

Official website of Rocky Hill

Official Website

Rocky Hill has 1 neighbours.

Montgomery township in Somerset County, New Jersey

Demographics

According to census records, the population of Rocky Hill decreased by 2.4% in 10 years.

Year	Population	% Change	Method
2010	682	-	census
2011	686	0.58%	estimation process
2012	684	-0.29%	estimation process
2013	685	0.15%	estimation process
2014	684	-0.15%	estimation process
2015	681	-0.44%	estimation process
2016	679	-0.29%	estimation process
2017	677	-0.3%	estimation process
2018	674	-0.45%	estimation process
2019	669	-0.75%	estimation process
2020	666	-0.45%	estimation process

Rocky Hill zip code is 08553. County name: Somerset, County fips: 34035

Rockyhill

People born in Rocky Hill (3)

People born in Rocky Hill, including politician from Georgia, United States John Macpherson Berrien, major in the Revolutionary War John Berrien, wrestler Anthony Cassar, .

More notable people

Nearby Schools and Colleges

Schools and campuses linked to Rocky Hill, NJ. Select a name to open its map and contact details.

Code	Name	City	ZIP
186131	Princeton University	Princeton (NJ)	08544-0070

Nearby Transit Stations (29)

Rail and bus stations connected to Rocky Hill, NJ. Select a station to open its map and address details.

Code	Name	Address	Type
PJC	Princeton Junction station	2 Wallace Road	RAIL
NBK	New Brunswick station	French and Albany Streets	RAIL
TRE	Trenton Transit Center	72 South Clinton Avenue	RAIL
MET	Metropark station	100 Middlesex-Essex Turnpike	RAIL
CWH	Cornwells Heights	700 Station Ave.	RAIL

Nearby Post Offices

Closest post offices linked to Rocky Hill.

Post Office Name	City	ZIP
Rocky Hill Post Office	Rocky Hill (NJ)	08553

Other places with the same name (1)

Rocky Hill, Connecticut town in Connecticut, United States with a population of 20,037 people.

Other cities in Somerset County

Cities, towns, neighborhoods & other populated places in Somerset County , NJ.

City Name	Population	Title
Hillsborough	40,105	Township in Somerset county, New Jersey
Voorhees	29,107	Township in Camden County, New Jersey
Montgomery	23,094	Township in Somerset County, New Jersey
North Plainfield	21,246	Borough in Somerset County, New Jersey
Somerville	12,157	Borough in Somerset County, New Jersey
Bound Brook	10,159	Borough in Somerset County, New Jersey
Manville	10,046	Borough in Somerset County, New Jersey
Bedminster	7,949	Township of New Jersey
Raritan	7,748	Borough in Somerset County, New Jersey
Bernardsville	7,556	Borough in New Jersey, United States
Watchung	6,007	Borough in Somerset County, New Jersey, United States
South Bound Brook	4,518	Borough in Somerset County, New Jersey
Peapack	2,086	Human settlement in Somerset County, New Jersey, United States of America
Far Hills	901	Borough in Somerset County, New Jersey