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+
Largest cities in New Jersey
Other counties in New Jersey
Part of New Jersey
Metro areas in New Jersey
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.
Somerset County, NJ Climate
Somerset County, NJ has an average annual temperature of 11.2°C (52°F) and receives about 1235 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
11.2°C
Avg Temp
1235
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -2° / 29° | 97 mm |
| February | 0° / 32° | 75 mm |
| March | 5° / 40° | 101 mm |
| April | 10° / 50° | 104 mm |
| May | 16° / 61° | 116 mm |
| June | 21° / 69° | 104 mm |
| July | 24° / 74° | 127 mm |
| August | 23° / 73° | 112 mm |
| September | 19° / 66° | 109 mm |
| October | 12° / 54° | 93 mm |
| November | 7° / 44° | 101 mm |
| December | 1° / 35° | 96 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Somerset County, NJ
The most comfortable months to visit Somerset County, NJ are typically June, August and September, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 30°C high). The coldest is January (near -7°C low). July is usually the wettest month.
Where to stay near Somerset County
Visiting or relocating to Somerset County, NJ? Compare hotels and short-term rentals across the county — live availability and prices.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.