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.
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
What sets Somerset County apart is money: median household income runs $135,960, above the US median of $78,538. Somerset County is a county in New Jersey with a population of 346,203. It ranks #13 among counties in New Jersey by population.
Earnings sit at the high end: a median household income of $135,960, above the US median of $78,538. Hardship is rare relative to US counties: a poverty rate of just 3.5%, below the national 12.4%. Real estate commands a premium here — a median home value of $523,900, with typical rent around $1,921.
Somerset County is among the best-educated US counties: 57.4% of adults 25 and older hold a bachelor’s degree, above the national 35.0%. Working from home is common here: 20.5% of workers do so, above the national 14.0%, and the average commute runs about 32 minutes each way.
Taken together, the income and housing figures place Somerset County firmly in the higher-cost, higher-earning tier of US counties — a profile that tends to track dense job markets and competitive housing.
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 |
|---|---|
| 2010 | 324,120 |
| 2011 | 326,277 |
| 2012 | 327,462 |
| 2013 | 329,052 |
| 2014 | 329,378 |
| 2015 | 329,682 |
| 2016 | 330,003 |
| 2017 | 330,650 |
| 2018 | 330,772 |
| 2019 | 329,998 |
| 2020 | 344,788 |
| 2021 | 346,562 |
| 2022 | 348,319 |
| 2023 | 352,095 |
| 2024 | 357,467 |
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
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
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+
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Other counties in New Jersey
Part of New Jersey
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County 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.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.