Somerset County, New Jersey Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 13th-largest in New Jersey

The population of Somerset County, New Jersey is 346,203 as of the 2023 American Community Survey, making it the 13th-largest county in New Jersey. The median household income is $135,960, the median home value is $523,900, and the median age is 41.9.

The population of Somerset County has grown 10.3% since 2010 (324,120 → 357,467), a +0.70% annualized rate.

Somerset County within New Jersey · Source: US Census TIGER/Line via us-atlas

346,203

Population

+0.70%

Annual growth

1147

People / sq mi

$135,960

Median Income

$523,900

Median Home Value

Somerset County covers 302 sq mi of land at 1146.9 people per square mile.

About Somerset County, NJ

Somerset County is a county in New Jersey with a population of 346,203. It ranks #13 among counties in New Jersey by population. The median age is 41.9, older than the national median. The population is 49.3% male and 50.7% female.

The median household income in Somerset County is $135,960, above the US median of $74,580. 3.5% of residents live below the federal poverty level. Home values sit at a median of $523,900, with monthly rent averaging $1,921. The homeownership rate of 74.5% is higher than the national rate of 64.8%.

Educational attainment in Somerset County reflects 57.4% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 20.5% of workers primarily work from home, noticeably above the national work-from-home rate of 14.2%. The average commute is 31.5 minutes each way.

Somerset County Population History (2010-2024)

The county of Somerset County had a population of 324,120 in 2010 and 357,467 in 2024, a 10.3% growth over 14 years. The peak was 357,467 in 2024. Average annual growth rate: 0.71%.

357,467

Population (2024)

324,120

Population (2010)

357,467

Peak (2024)

0.71%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	324,120	-	-	estimate
2011	326,277	+2,157	+0.67%	estimate
2012	327,462	+1,185	+0.36%	estimate
2013	329,052	+1,590	+0.49%	estimate
2014	329,378	+326	+0.10%	estimate
2015	329,682	+304	+0.09%	estimate
2016	330,003	+321	+0.10%	estimate
2017	330,650	+647	+0.20%	estimate
2018	330,772	+122	+0.04%	estimate
2019	329,998	-774	-0.23%	estimate
2020	344,788	+14,790	+4.48%	estimate
2021	346,562	+1,774	+0.51%	estimate
2022	348,319	+1,757	+0.51%	estimate
2023	352,095	+3,776	+1.08%	estimate
2024	357,467	+5,372	+1.53%	estimate

Race & Ethnicity

White	54.1%
Black or African American	9.6%
Asian	0.0%
Hispanic or Latino (any race)	1.1%
Two or More Races	0.0%

Age & Sex

41.9

Median Age

50.7%

Female

49.3%

Male

16.5%

Age 65+

Age Distribution

Under 5

5.0%

5–9

5.8%

10–14

6.3%

15–19

6.5%

20–24

5.8%

25–34

11.3%

35–44

13.2%

45–54

14.6%

55–59

7.8%

60–64

7.1%

65–74

9.5%

75–84

4.8%

85+

2.2%

Children (under 15): 17.1% · Seniors (65+): 16.5%

Income & Poverty

Median household income	$135,960+$34,910 vs state
Mean household income	$186,372
Per-capita income	$70,321
Poverty rate	3.5%-3.5% vs state
Unemployment rate	3.3%
Employment-to-population	66.3%

Top Industries by Employment

Professional & business services

21.7%

Finance & real estate

17.5%

Manufacturing

13.4%

Information

9.6%

Education & health care

5.7%

Retail trade

4.6%

Construction

4.3%

Arts, entertainment & food

3.8%

The largest employment sector in Somerset County is professional & business services, accounting for 21.7% of workers.

How residents commute

3.7%

Drive alone

1.3%

Carpool

65.6%

Public transit

20.5%

Work from home

31.5 min

Avg commute

Housing

$523,900+$96,300 vs state

Median home value

$1,921

Median rent

74.5%

Homeownership rate

132,831

Total housing units

97.5%

Occupied

2.5%

Vacant

25.5%

Renter-occupied

Social & access

94.3%

With health insurance

97.5%

With broadband internet

20.1%

Foreign-born

3.5%

Veterans (18+)

8.2%

With a disability

65.3%

Speak language other than English at home

Education

93.8%

High School+

57.4%

Bachelor's+

Largest cities in New Jersey

Newark (307,188)Jersey City (289,691)Paterson (157,660)Elizabeth (135,887)Toms River (93,915)Trenton (89,966)Clifton (89,247)Camden (71,471)Bayonne (70,468)Lakewood (69,884)All New Jersey cities →

Other counties in New Jersey

Bergen County (954,717)Middlesex County (861,535)Essex County (854,130)Hudson County (710,478)Ocean County (646,434)Monmouth County (643,615)Union County (572,549)Camden County (524,042)Passaic County (518,289)Morris County (510,375)All New Jersey counties →

Part of New Jersey

New Jersey demographic profile All New Jersey data →

Metro areas in New Jersey

New York (19,756,722)Philadelphia (6,241,882)Allentown (866,764)Trenton (383,286)Atlantic City (369,940)Vineland (152,915)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Frequently Asked Questions

Somerset County, New Jersey has a population of 346,203 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 13th-largest county in New Jersey. Population density is 1147 people per square mile.

The population of Somerset County has grown 10.3% since 2010 (324,120 → 357,467), a +0.70% annualized rate.

The median household income in Somerset County, New Jersey is $135,960, with mean (average) household income of $186,372 and per-capita income of $70,321. 3.5% of residents live below the federal poverty level.

In Somerset County, the largest racial and ethnic groups are White (54.1%), Black or African American (9.6%), Hispanic or Latino (1.1%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Somerset County, New Jersey is 41.9 years. Residents are 50.7% female and 49.3% male.

The median home value in Somerset County is $523,900 and median monthly rent is $1,921. 74.5% of occupied housing units are owner-occupied. The county has 132,831 total housing units, 2.5% of which are vacant.

The largest employment sector in Somerset County, New Jersey is professional, scientific, and management services, employing 21.7% of workers. The unemployment rate is 3.3%.

Newark is among the largest cities associated with Somerset County, New Jersey, with a population of 307,188.