County · New Jersey
Somerset County, New Jersey
Somerset County, New Jersey. Somerset County had 356,486 residents in 2025 by the Census Bureau's estimate, up 3.2% since 2020, in line with New Jersey (+2.8%). It holds 59 places (12 cities, villages and boroughs, 9 towns and townships and 38 census-designated) and 74 census tracts. GEOID 34035.
Somerset County is one of the 22 counties of the New York-Newark-Jersey City, NY-NJ metropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
356,486
Census Bureau estimate (no margin published)
2020 Census count: 345,361 · ACS 2020-2024: 349,846
Median household income
$140,374
±$3,294 (90% margin)
New Jersey: $103,556
Median home value
$552,100
±$7,374 (90% margin)
New Jersey: $454,400
Median gross rent
$2,033
±$52 (90% margin)
New Jersey: $1,720
How many people live in Somerset County, and is it growing?
The 2020 Census counted 345,361 residents in Somerset County. The Census Bureau estimates 356,486 for July 1, 2025, up 3.2% since 2020, in line with New Jersey (+2.8%). The 2020-2024 American Community Survey puts the population at 349,846 over 302 square miles of land.
| Measure | Somerset County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Total population | 349,846 | 9,343,809 | +20,008 |
| Households | 130,802±435 | 3,507,701 | +12,609 |
| Average household size | 2.64±0.01 | 2.62 | −0.11 |
| Housing units | 133,639±156 | 3,791,354 | +6,922 |
Somerset County's population since 2000
From 297,490 in 2000 to 356,486 in 2025: up 19.8%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Somerset County?
Somerset County holds 59 places: 12 cities, villages and boroughs (incorporated places), 9 towns and townships (county subdivisions with their own government) and 38 census-designated places. The largest is Franklin Township, Somerset County with 69,105 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Franklin Township, Somerset County | 68,364 | $124,648 |
|---|---|---|
| Bridgewater Township | 45,977 | $172,851 |
| Hillsborough Township | 43,276 | $154,031 |
| Bernards Township | 27,830 | $194,107 |
| Montgomery Township | 23,690 | $226,771 |
| Somerset | 22,968 | $121,028 |
| North Plainfield | 22,808 | $87,349 |
| Hillsborough | 22,214 | $144,112 |
| Warren Township | 15,923 | $204,063 |
| Branchburg Township | 14,940 | $168,832 |
| Bradley Gardens | 14,077 | $177,849 |
| Franklin Park | 13,430 | $114,946 |
| Somerville | 12,346 | $103,760 |
| Martinsville | 12,147 | $205,000 |
| Bound Brook | 11,988 | $90,571 |
| The Hills | 11,410 | $154,564 |
| Manville | 10,953 | $93,333 |
| East Franklin | 9,788 | $115,458 |
| Blackwells Mills | 9,473 | $250,000 or more |
| Bedminster Township | 8,272 | $123,709 |
| Bernardsville | 7,893 | $236,115 |
| Raritan | 7,835 | $107,672 |
| Green Brook Township | 7,281 | $208,375 |
| Basking Ridge | 7,196 | $188,295 |
| Franklin Center | 6,803 | $157,212 |
| Green Knoll | 6,594 | $165,227 |
| Watchung | 6,449 | $173,672 |
| Finderne | 6,392 | $118,064 |
| Bridgewater Center | 6,082 | $205,595 |
| Belle Mead | 5,569 | $223,250 |
| Lyons | 5,345 | $250,000 or more |
| Neshanic Station | 5,224 | $221,395 |
| South Bound Brook | 4,863 | $112,961 |
| Six Mile Run | 3,383 | $140,379 |
| Peapack and Gladstone | 2,558 | $202,578 |
| Middlebush | 2,368 | $156,938 |
| Ten Mile RunGEOID 3472435 | 2,055 | $162,868 |
| Weston | 2,023 | $83,197 |
| Liberty Corner | 1,877 | $241,480 |
| VoorheesGEOID 3476250 | 1,517 | $89,200 |
| Bedminster | 1,244 | $128,594 |
| FlagtownGEOID 3423610 | 1,070 | $229,612 |
| Far Hills | 924 | $143,250 |
| NeshanicGEOID 3450040 | 854 | $166,250 |
| GriggstownGEOID 3428470 | 835 | $168,393 |
| Pleasant PlainsGEOID 3459500 | 792 | not published |
| Rocky Hill | 743 | $148,056 |
| East MillstoneGEOID 3419330 | 588 | not published |
| East Rocky HillGEOID 3419490 | 468 | $211,731 |
| Millstone | 448 | $141,709 |
| HarlingenGEOID 3429940 | 430 | $231,923 |
| PluckeminGEOID 3459730 | 359 | $54,175 |
| Kingston | 1,581 | $110,813 |
| BlawenburgGEOID 3406190 | 287 | $250,000 or more |
| ClydeGEOID 3413990 | 243 | $108,750 |
| SkillmanGEOID 3467860 | 237 | not published |
| PottersvilleGEOID 3460750 | 467 | $171,801 |
| LamingtonGEOID 3438670 | 135 | $154,511 |
| ZarephathGEOID 3483290 | 69 | not published |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Somerset County?
The median resident of Somerset County is 41.8 years old; 21.2% are under 18 and 17.0% are 65 or older. The largest group is non-Hispanic white residents at 49.3%, then non-Hispanic Asian residents at 19.6%. 27.9% of residents were born outside the United States.
| Measure | Somerset County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Median age | 41.8±0.2 | 40.1 | no clear change |
| Under 18 years | 21.2% | 21.8% | – |
| 65 years and over | 17.0%±0.1 pts | 17.2% | – |
| Hispanic or Latino (any race) | 17.6% | 22.5% | +2.9 pts |
| White alone, not Hispanic | 49.3%±0.2 pts | 50.9% | −7.0 pts |
| Black or African American alone, not Hispanic | 9.3%±0.2 pts | 12.2% | no clear change |
| Asian alone, not Hispanic | 19.6%±0.2 pts | 10.0% | +2.0 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.6%±0.4 pts | 3.5% | – |
| Some other race alone, not Hispanic | 0.7%±0.2 pts | 0.8% | – |
| Born outside the United States | 27.9%±0.7 pts | 23.9% | +2.8 pts |
| Speak a language other than English at home (age 5+) | 34.7%±0.7 pts | 33.1% | – |
| Civilian veterans (age 18+) | 3.2%±0.3 pts | 3.7% | – |
| With a disability | 8.6%±0.4 pts | 10.8% | – |
| No health insurance coverage | 5.4%±0.5 pts | 7.5% | no clear change |
| High school graduate or higher (age 25+) | 94.0%±0.5 pts | 90.7% | – |
| Bachelor's degree or higher (age 25+) | 57.8%±0.9 pts | 43.6% | +3.1 pts |
| Graduate or professional degree (age 25+) | 26.6%±0.8 pts | 17.6% | – |
| Moved from another state in the past year | 1.5%±0.3 pts | 1.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Somerset County earn?
Half of Somerset County's 130,802 households earn less than $140,374 a year (±$3,294), against $103,556 in New Jersey. In 2015-2019 it was $139,820 in 2024 dollars; the margins of error cannot tell the two periods apart. 5.4% of residents live below the poverty line.
| Measure | Somerset County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $140,374±$3,294 | $103,556 | no clear change |
| Mean household income | $191,543±$3,211 | $143,363 | – |
| Per capita income | $72,193±$1,184 | $54,253 | +$3,486 |
| People below the poverty line | 5.4%±0.6 pts | 9.7% | no clear change |
| Children under 18 below the poverty line | 6.7%±1.4 pts | 13.0% | no clear change |
| Households receiving SNAP | 3.7%±0.5 pts | 9.1% | – |
| Households with a broadband subscription | 95.8%±0.5 pts | 92.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Somerset County?
Owners occupy 74.3% of Somerset County's occupied homes and renters 25.7%. The median owner-occupied home is valued at $552,100 by its owner (±$7,374). The median renter pays $2,033 a month including utilities, and 40.5% of renters pay 35% or more of their income on rent.
| Measure | Somerset County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $552,100±$7,374 | $454,400 | +$22,040 |
| Median gross rent | $2,033±$52 | $1,720 | +$71 |
| Renters paying 35% or more of income on rent | 40.5%±2.6 pts | 42.7% | no clear change |
| Median monthly owner costs, with a mortgage | $3,156±$52 | $2,829 | – |
| Owner-occupied homes | 74.3%±0.9 pts | 63.8% | −1.5 pts |
| Housing units | 133,639±156 | 3,791,354 | +6,922 |
| Homeowner vacancy rate | 0.3%±0.2 pts | 0.7% | – |
| Rental vacancy rate | 2.0%±0.8 pts | 3.5% | – |
| Single-family detached homes | 57.8%±0.9 pts | 52.6% | – |
| Mobile homes | 0.2%±0.1 pts | 0.9% | – |
| Built 2020 or later | 1.3%±0.2 pts | 1.1% | – |
| Built 1939 or earlier | 9.3%±0.6 pts | 17.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Somerset County building?
Builders took permits for 763 new housing units across Somerset County in 2025 (267 single-family), 2.1 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Somerset County get to work?
63.8% of Somerset County's workers drive alone and 22.7% work from home. The average trip to work takes 31.4 minutes. The unemployment rate in 2020-2024 averaged 4.7%.
| Measure | Somerset County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 70.0%±0.6 pts | 66.4% | – |
| Unemployment rate | 4.7%±0.5 pts | 6.3% | no clear change |
| Drove alone to work | 63.8%±1.1 pts | 62.2% | – |
| Carpooled | 6.5%±0.5 pts | 7.7% | – |
| Public transportation | 3.4%±0.4 pts | 8.1% | – |
| Walked | 1.2%±0.2 pts | 2.6% | – |
| Worked from home | 22.7%±0.9 pts | 16.8% | +16.5 pts |
| Mean travel time to work | 31.4 min±0.7 | 30.5 min | −1.1 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Somerset County's census tracts?
Somerset County is divided into 74 census tracts. Among those with a reliable estimate, median household income runs from $54,627 (Tract 520.02) to $250,000 or more (Tract 539.04).
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Somerset County compare with New Jersey's other counties?
| Measure | Rank |
|---|---|
| Population | 13th of 21 |
| Growth 2020-2025 | 6th of 21 |
| Residents per square mile | 10th of 21 |
| Median household income | 2nd of 21 |
| Median home value | 4th of 21 |
| Median gross rent | 1st of 21 |
| Poverty rate | 19th of 21 |
| Bachelor's degree or higher | 1st of 21 |
| Median age | 10th of 21 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Somerset County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.