What is the population of Somerset County?

The population of Somerset County, NJ is 329,331.

Where is Somerset County located?

Somerset County, NJ is located at latitude 40.5635100 and longitude -74.6163100. It is in United States.

What is the area of Somerset County?

The area of Somerset County, NJ is 10607 km².

What is the elevation of Somerset County?

Somerset County, NJ has an elevation of 16 meters (52 feet) above sea level.

What time zone is Somerset County in?

Somerset County, NJ is in the America/New_York time zone.

How has the population of Somerset County changed?

The population of Somerset County, NJ has increased from 323,444 (2010) to 329,331 (2020), a change of 1.8%.

Somerset County, New Jersey

Somerset County: county in Maine, United States

About

Somerset County is a county located in the U.S. state of New Jersey. As of the 2010 census, the population was 323,444 and a population density of 30 people per km². After 10 years in 2020 county had an estimated population of 329,331 inhabitants. Its county seat is Skowhegan. The county was created 217 years ago in 1808.

Somerset County locator map — Location of Somerset County on New Jersey map.

County Snapshot

Somerset County at a glance

Somerset County currently has 15 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

New Jersey counties

Open related pages

Largest city

Hillsborough

Population 40,105

Quick Facts about Somerset County

Population	329,331 (2020)
Country	United States of America
State	New Jersey (United States)
Different from	Somerset County, Somerset County, Somerset County
Area	10607 km²
Water as percent of area	4.1%
Land as percent of area	95.9%
Latitude & Longitude	40.5635,-74.6163
Named for	Somerset
Altitude	52 feet / 16 meters
Capital	Skowhegan
Establishment	January 01, 1809
Time Zone	America/New_York
Local time	17:15:09 (17th April 2026)
Density	31 Pop. per km² as of 2020
Population growth	1.79% (2010-2020)
Weather	81℉ Chance Rain Showers 7-days weather

Courthouse Skowhegan ME image

Geography

Somerset County is located at 40°33'49"N 74°36'59"W (40.5635100, -74.6163100). It has 6 neighbors: Aroostook County, Franklin County, Kennebec County, Penobscot County, Piscataquis County and Waldo County.

Somerset County map

Click "full screen"

icon to open full mode. View satellite images

The largest city of Somerset County is North Plainfield with a population of 21,246. Other cities include, Somerville population 12,157, Bound Brook population 10,159, Manville population 10,046 and Raritan population 7,748. See all Somerset County cities & populated places.

Somerset County Populated Places

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

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
Rocky Hill	666	Borough in Somerset County, New Jersey

Weather

81°F

Chance Rain Showers

5 mph NW Friday

A chance of rain showers after 8am. Mostly sunny, with a high near 81. Northwest wind around 5 mph. Chance of precipitation is 30%.

7-Day Forecast

Official website of Somerset County

Official Website

Somerset County has 6 neighbours.

Aroostook County county in Maine, United States
Franklin County county in Maine, United States
Kennebec County county in Maine, United States
Penobscot County county in Maine, United States of America
Piscataquis County county in Maine, United States
Waldo County county in Maine, United States

Harmony
Mercer
Moose River
Fairfield
Pittsfield
Northwest Somerset, Maine
Seboomook Lake, Maine
Smithfield
Highland Plantation
Solon
Detroit
Ripley
Cambridge
Starks
Anson
Brighton Plantation, Maine
West Forks
Caratunk
Canaan
Northeast Somerset, Maine
Dennistown
St. Albans
Madison
Jackman
Skowhegan
Pleasant Ridge Plantation, Maine
Central Somerset, Maine
Cornville
The Forks
Palmyra
New Portland
Bingham
Athens
Hartland
Embden
Norridgewock
Moscow

Demographics

The population of Somerset County increased by 1.79% in 10 years.

Year	Population	% Change	Method
2010	323,444	-	census
2011	326,249	0.86%	estimation process
2012	327,407	0.35%	estimation process
2013	329,047	0.5%	estimation process
2014	329,329	0.09%	estimation process
2015	329,626	0.09%	estimation process
2016	329,875	0.08%	estimation process
2017	330,573	0.21%	estimation process
2018	330,181	-0.12%	estimation process
2019	328,934	-0.38%	estimation process
2020	329,331	0.12%	estimation process

Comitatul Somerset, Comte de Somerset, Comté de Somerset, Condado de Somerset, Condado han Somerset, Contea di Somerset, Hrabstwo Somerset, Okrug Samerset, Quan Somerset, Quận Somerset, Samurset, Somerset, Somerset Kun, Somerset Kūn, Somerset konderria, Somerset megye, Somerset srjan, sa mo sai te xian, samasetto jun, shhrstan samrst nywjrsy, somaraseta ka'unti, Округ Самерсет, Самърсет, Сомерсет, Սոմերսետ շրջան, سومرسٹ کاؤنٹی, سومرسیٹ کاؤنٹی، نیو جرسی, شهرستان سامرست، نیوجرسی, مقاطعة سومرست, সোমারসেট কাউন্টি, サマセット郡, 萨默塞特县

People born in Somerset County (1)

American politician (1876-1940) Clyde H. Smith was born in Somerset County

Other places with the same name (3)

Somerset County, Pennsylvania county in Pennsylvania, United States with a population of 72,916 people.
Somerset County, Maine county in Maine, United States with a population of 50,635 people.
Somerset County, Maryland county in Maryland, United States with a population of 25,453 people.

New Jersey Other Counties (more counties)

County Name	Population	Title
Somerset	965,424	This large community in Somerset County, New Jersey, is situated at an elevation of 92 feet.
Bergen County	930,394	County in New Jersey, United States
Middlesex County	822,736	County in New Jersey, United States
Essex County	800,501	County in New York, United States
Hudson County	671,666	County in New Jersey, United States
Monmouth County	618,381	County in New Jersey, United States
Ocean County	614,237	County in New Jersey, United States
Union County	555,394	County in Oregon, United States
Camden County	506,809	County in Missouri, United States
Passaic County	500,382	County in New Jersey, United States
Morris County	491,087	County in New Jersey, United States
Burlington County	446,596	County in New Jersey, United States
Mercer County	367,239	County in West Virginia, United States
Gloucester County	293,245	County in New Jersey, United States
Newark	282,520	The most populous city in New Jersey and the center of the Newark metropolitan area.
Atlantic County	262,945	County in New Jersey, United States