County · New Jersey
Warren County, New Jersey
Warren County, New Jersey. Warren County had 112,953 residents in 2025 by the Census Bureau's estimate, up 3.0% since 2020, in line with New Jersey (+2.8%). It holds 58 places (5 cities, villages and boroughs, 17 towns and townships and 36 census-designated) and 23 census tracts. GEOID 34041.
Warren County is one of the 4 counties of the Allentown-Bethlehem-Easton, PA-NJ metropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
112,953
Census Bureau estimate (no margin published)
2020 Census count: 109,632 · ACS 2020-2024: 110,849
Median household income
$100,869
±$3,607 (90% margin)
New Jersey: $103,556
Median home value
$346,500
±$6,745 (90% margin)
New Jersey: $454,400
Median gross rent
$1,409
±$39 (90% margin)
New Jersey: $1,720
How many people live in Warren County, and is it growing?
The 2020 Census counted 109,632 residents in Warren County. The Census Bureau estimates 112,953 for July 1, 2025, up 3.0% since 2020, in line with New Jersey (+2.8%). The 2020-2024 American Community Survey puts the population at 110,849 over 357 square miles of land.
| Measure | Warren County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Total population | 110,849 | 9,343,809 | +4,987 |
| Households | 45,391±321 | 3,507,701 | +3,804 |
| Average household size | 2.40±0.02 | 2.62 | −0.10 |
| Housing units | 46,789±53 | 3,791,354 | +1,316 |
Warren County's population since 2000
From 102,437 in 2000 to 112,953 in 2025: up 10.3%. 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 Warren County?
Warren County holds 58 places: 5 cities, villages and boroughs (incorporated places), 17 towns and townships (county subdivisions with their own government) and 36 census-designated places. The largest is Phillipsburg with 15,456 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Phillipsburg | 15,249 | $68,324 |
|---|---|---|
| Hackettstown | 10,248 | $93,083 |
| Lopatcong Township | 8,776 | $91,114 |
| Mansfield Township, Warren County | 7,781 | $88,845 |
| Washington | 7,299 | $81,336 |
| Washington Township, Warren County | 6,492 | $144,444 |
| Blairstown Township | 5,704 | $124,231 |
| Greenwich Township, Warren County | 5,473 | $169,079 |
| Independence Township | 5,469 | $92,243 |
| Allamuchy Township | 5,335 | $131,626 |
| Beattystown | 4,701 | $87,500 |
| White Township | 4,606 | $75,726 |
| Panther Valley | 4,391 | $131,169 |
| Pohatcong Township | 3,241 | $103,611 |
| Franklin Township, Warren County | 2,968 | $132,697 |
| Knowlton Township | 2,894 | $97,734 |
| Liberty Township | 2,670 | $120,494 |
| Greenwich (Warren County) | 2,558 | $164,167 |
| Belvidere | 2,520 | $95,714 |
| Harmony Township | 2,503 | $92,176 |
| Oxford Township | 2,444 | $102,600 |
| Alpha | 2,328 | $90,333 |
| Frelinghuysen Township | 2,199 | $122,727 |
| Hope Township | 1,835 | $105,625 |
| Upper Pohatcong | 1,714 | $103,444 |
| Hardwick Township | 1,598 | $124,625 |
| Brass CastleGEOID 3407360 | 1,536 | $152,256 |
| Oxford | 1,033 | $77,989 |
| ViennaGEOID 3475950 | 881 | $170,913 |
| Delaware ParkGEOID 3417260 | 739 | $121,552 |
| BrookfieldGEOID 3408140 | 727 | $59,714 |
| Lopatcong OverlookGEOID 3441495 | 692 | $73,299 |
| StewartsvilleGEOID 3470800 | 636 | $161,985 |
| Mountain LakeGEOID 3448450 | 494 | $108,056 |
| BlairstownGEOID 3406130 | 493 | $150,417 |
| HainesburgGEOID 3428920 | 422 | $105,188 |
| New VillageGEOID 3452050 | 399 | $111,094 |
| JohnsonburgGEOID 3436150 | 381 | $103,056 |
| HarmonyGEOID 3430060 | 374 | $59,375 |
| FinesvilleGEOID 3423340 | 364 | $68,780 |
| Silver Lake (Warren County)GEOID 3467650 | 333 | $107,083 |
| Upper StewartsvilleGEOID 3475145 | 329 | $250,000 or more |
| Anderson | 306 | $89,034 |
| Great MeadowsGEOID 3427360 | 305 | not published |
| AsburyGEOID 3401900 | 270 | $128,889 |
| Port ColdenGEOID 3460210 | 260 | $57,196 |
| HopeGEOID 3433030 | 256 | $81,477 |
| BridgevilleGEOID 3407660 | 229 | $75,500 |
| Port MurrayGEOID 3460450 | 227 | not published |
| ColumbiaGEOID 3414590 | 215 | $74,125 |
| BroadwayGEOID 3408020 | 213 | $66,094 |
| ButtzvilleGEOID 3409100 | 205 | not published |
| BrainardsGEOID 3407120 | 194 | not published |
| MarksboroGEOID 3443980 | 186 | $141,563 |
| DelawareGEOID 3417200 | 173 | $66,528 |
| Mount HermonGEOID 3448840 | 172 | $55,417 |
| AllamuchyGEOID 3400640 | 156 | not published |
| HutchinsonGEOID 3433690 | 103 | $131,750 |
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 Warren County?
The median resident of Warren County is 44.0 years old; 19.3% are under 18 and 19.6% are 65 or older. The largest group is non-Hispanic white residents at 74.6%, then Hispanic or Latino residents (of any race) at 13.0%. 10.6% of residents were born outside the United States.
| Measure | Warren County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Median age | 44.0±0.3 | 40.1 | −0.4 |
| Under 18 years | 19.3% | 21.8% | – |
| 65 years and over | 19.6%±0.1 pts | 17.2% | – |
| Hispanic or Latino (any race) | 13.0% | 22.5% | +3.7 pts |
| White alone, not Hispanic | 74.6%±0.4 pts | 50.9% | −7.1 pts |
| Black or African American alone, not Hispanic | 5.6%±0.4 pts | 12.2% | +1.2 pts |
| Asian alone, not Hispanic | 3.0%±0.2 pts | 10.0% | +0.3 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.1%±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 | 3.5%±0.6 pts | 3.5% | – |
| Some other race alone, not Hispanic | 0.2%±0.1 pts | 0.8% | – |
| Born outside the United States | 10.6%±0.8 pts | 23.9% | no clear change |
| Speak a language other than English at home (age 5+) | 15.4%±1.0 pts | 33.1% | – |
| Civilian veterans (age 18+) | 5.4%±0.5 pts | 3.7% | – |
| With a disability | 11.5%±0.8 pts | 10.8% | – |
| No health insurance coverage | 4.8%±0.6 pts | 7.5% | −0.9 pts |
| High school graduate or higher (age 25+) | 94.1%±0.6 pts | 90.7% | – |
| Bachelor's degree or higher (age 25+) | 36.5%±1.5 pts | 43.6% | +3.5 pts |
| Graduate or professional degree (age 25+) | 12.0%±0.9 pts | 17.6% | – |
| Moved from another state in the past year | 1.3%±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 Warren County earn?
Half of Warren County's 45,391 households earn less than $100,869 a year (±$3,607), against $103,556 in New Jersey. In 2015-2019 it was $100,064 in 2024 dollars; the margins of error cannot tell the two periods apart. 8.3% of residents live below the poverty line.
| Measure | Warren County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $100,869±$3,607 | $103,556 | no clear change |
| Mean household income | $118,920±$3,243 | $143,363 | – |
| Per capita income | $48,600±$1,311 | $54,253 | no clear change |
| People below the poverty line | 8.3%±1.0 pts | 9.7% | no clear change |
| Children under 18 below the poverty line | 10.4%±2.4 pts | 13.0% | no clear change |
| Households receiving SNAP | 7.4%±1.2 pts | 9.1% | – |
| Households with a broadband subscription | 92.5%±1.0 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 Warren County?
Owners occupy 75.1% of Warren County's occupied homes and renters 24.9%. The median owner-occupied home is valued at $346,500 by its owner (±$6,745). The median renter pays $1,409 a month including utilities, and 40.3% of renters pay 35% or more of their income on rent.
| Measure | Warren County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $346,500±$6,745 | $454,400 | +$21,351 |
| Median gross rent | $1,409±$39 | $1,720 | no clear change |
| Renters paying 35% or more of income on rent | 40.3%±4.2 pts | 42.7% | no clear change |
| Median monthly owner costs, with a mortgage | $2,317±$45 | $2,829 | – |
| Owner-occupied homes | 75.1%±1.4 pts | 63.8% | +3.4 pts |
| Housing units | 46,789±53 | 3,791,354 | +1,316 |
| Homeowner vacancy rate | 0.6%±0.5 pts | 0.7% | – |
| Rental vacancy rate | 0.8%±0.5 pts | 3.5% | – |
| Single-family detached homes | 68.1%±1.5 pts | 52.6% | – |
| Mobile homes | 0.9%±0.3 pts | 0.9% | – |
| Built 2020 or later | 0.6%±0.3 pts | 1.1% | – |
| Built 1939 or earlier | 23.6%±1.6 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 Warren County building?
Builders took permits for 335 new housing units across Warren County in 2025 (292 single-family), 3.0 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 Warren County get to work?
76.5% of Warren County's workers drive alone and 12.5% work from home. The average trip to work takes 34.0 minutes. The unemployment rate in 2020-2024 averaged 5.1%.
| Measure | Warren County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 67.1%±0.8 pts | 66.4% | – |
| Unemployment rate | 5.1%±0.8 pts | 6.3% | no clear change |
| Drove alone to work | 76.5%±1.6 pts | 62.2% | – |
| Carpooled | 5.9%±0.7 pts | 7.7% | – |
| Public transportation | 1.8%±0.5 pts | 8.1% | – |
| Walked | 1.8%±0.6 pts | 2.6% | – |
| Worked from home | 12.5%±1.1 pts | 16.8% | +7.7 pts |
| Mean travel time to work | 34.0 min±1.1 | 30.5 min | −2.0 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 Warren County's census tracts?
Warren County is divided into 23 census tracts. Among those with a reliable estimate, median household income runs from $71,679 (Tract 307) to $169,079 (Tract 321.02).
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Warren County compare with New Jersey's other counties?
| Measure | Rank |
|---|---|
| Population | 19th of 21 |
| Growth 2020-2025 | 8th of 21 |
| Residents per square mile | 18th of 21 |
| Median household income | 11th of 21 |
| Median home value | 16th of 21 |
| Median gross rent | 16th of 21 |
| Poverty rate | 13th of 21 |
| Bachelor's degree or higher | 15th of 21 |
| Median age | 3rd 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 Warren 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.