County · New Jersey
Middlesex County, New Jersey
Middlesex County, New Jersey. Middlesex County had 883,335 residents in 2025 by the Census Bureau's estimate, up 2.3% since 2020, in line with New Jersey (+2.8%). It holds 61 places (15 cities, villages and boroughs, 10 towns and townships and 36 census-designated) and 192 census tracts. GEOID 34023.
Middlesex 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
883,335
Census Bureau estimate (no margin published)
2020 Census count: 863,162 · ACS 2020-2024: 871,290
Median household income
$111,549
±$1,881 (90% margin)
New Jersey: $103,556
Median home value
$462,900
±$2,710 (90% margin)
New Jersey: $454,400
Median gross rent
$1,871
±$20 (90% margin)
New Jersey: $1,720
How many people live in Middlesex County, and is it growing?
The 2020 Census counted 863,162 residents in Middlesex County. The Census Bureau estimates 883,335 for July 1, 2025, up 2.3% since 2020, in line with New Jersey (+2.8%). The 2020-2024 American Community Survey puts the population at 871,290 over 309 square miles of land.
| Measure | Middlesex County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Total population | 871,290 | 9,343,809 | +45,370 |
| Households | 307,782±1,150 | 3,507,701 | +22,777 |
| Average household size | 2.75±0.01 | 2.62 | −0.04 |
| Housing units | 317,979±208 | 3,791,354 | +16,413 |
Middlesex County's population since 2000
From 750,162 in 2000 to 883,335 in 2025: up 17.8%. 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 Middlesex County?
Middlesex County holds 61 places: 15 cities, villages and boroughs (incorporated places), 10 towns and townships (county subdivisions with their own government) and 36 census-designated places. The largest is Edison Township with 109,077 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Edison Township | 107,588 | $125,145 |
|---|---|---|
| Woodbridge Township | 103,639 | $108,928 |
| Old Bridge Township | 66,876 | $104,587 |
| Piscataway Township | 60,804 | $127,832 |
| Perth Amboy | 55,436 | $61,977 |
| New Brunswick | 55,266 | $65,810 |
| East Brunswick Township | 49,715 | $143,343 |
| Monroe Township, Middlesex County | 48,594 | $107,892 |
| South Brunswick Township | 47,043 | $150,933 |
| Sayreville | 45,345 | $99,979 |
| North Brunswick Township | 43,905 | $120,764 |
| Old Bridge | 27,210 | $111,996 |
| Carteret | 25,326 | $96,862 |
| South Plainfield | 24,338 | $130,239 |
| Plainsboro Township | 24,084 | $131,638 |
| Iselin | 20,088 | $109,500 |
| Woodbridge | 19,839 | $104,926 |
| Colonia | 18,609 | $122,713 |
| Avenel | 16,920 | $101,670 |
| South River | 16,118 | $96,147 |
| Highland Park | 15,072 | $104,694 |
| Metuchen | 15,049 | $158,052 |
| Princeton Meadows | 14,776 | $131,213 |
| Middlesex | 14,636 | $105,000 |
| Fords | 12,941 | $115,861 |
| Kendall Park | 9,989 | $165,958 |
| South Amboy | 9,411 | $91,997 |
| Monmouth Junction | 8,895 | $133,585 |
| Spotswood | 8,163 | $105,060 |
| Dayton | 8,138 | $151,902 |
| Madison Park | 8,050 | $79,509 |
| Dunellen | 7,637 | $86,967 |
| Heathcote | 7,154 | $141,295 |
| Milltown | 7,037 | $140,960 |
| Laurence Harbor | 6,635 | $84,291 |
| Jamesburg | 5,783 | $110,972 |
| Rutgers University-Busch CampusGEOID 3465249 | 4,586 | not published |
| Port Reading | 3,921 | $134,479 |
| Cranbury Township | 3,842 | $216,691 |
| Rutgers University-Livingston CampusGEOID 3465260 | 3,545 | not published |
| Keasbey | 3,027 | not published |
| Rossmoor | 2,992 | $64,074 |
| Clearbrook | 2,909 | $37,411 |
| Sewaren | 2,885 | $108,948 |
| Menlo Park Terrace | 2,806 | $110,278 |
| Plainsboro Center | 2,760 | $119,317 |
| Brownville | 2,746 | $89,769 |
| Hopelawn | 2,603 | $113,242 |
| Concordia | 2,455 | $62,206 |
| Helmetta | 2,455 | $98,952 |
| Whittingham | 2,348 | $77,550 |
| Cranbury | 2,200 | $224,200 |
| Monroe Manor | 2,178 | $176,600 |
| Forsgate | 2,056 | $239,097 |
| Regency at MonroeGEOID 3462585 | 2,036 | $91,386 |
| StonebridgeGEOID 3470987 | 1,616 | $127,578 |
| DeansGEOID 3416720 | 1,615 | $248,875 |
| Kingston | 1,581 | $110,813 |
| The PondsGEOID 3472726 | 941 | $73,249 |
| Renaissance at MonroeGEOID 3462605 | 637 | $104,728 |
| Encore at MonroeGEOID 3421473 | 625 | $76,511 |
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 Middlesex County?
The median resident of Middlesex County is 39.5 years old; 21.5% are under 18 and 16.1% are 65 or older. The largest group is non-Hispanic white residents at 37.5%, then non-Hispanic Asian residents at 25.4%. 35.4% of residents were born outside the United States.
| Measure | Middlesex County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Median age | 39.5±0.3 | 40.1 | +0.9 |
| Under 18 years | 21.5%±0.1 pts | 21.8% | – |
| 65 years and over | 16.1%±0.1 pts | 17.2% | – |
| Hispanic or Latino (any race) | 23.6% | 22.5% | +2.4 pts |
| White alone, not Hispanic | 37.5%±0.2 pts | 50.9% | −5.6 pts |
| Black or African American alone, not Hispanic | 9.7%±0.1 pts | 12.2% | +0.2 pts |
| Asian alone, not Hispanic | 25.4%±0.2 pts | 10.0% | +1.5 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 | 2.9%±0.2 pts | 3.5% | – |
| Some other race alone, not Hispanic | 0.8%±0.2 pts | 0.8% | – |
| Born outside the United States | 35.4%±0.4 pts | 23.9% | +2.6 pts |
| Speak a language other than English at home (age 5+) | 47.4%±0.5 pts | 33.1% | – |
| Civilian veterans (age 18+) | 3.0%±0.2 pts | 3.7% | – |
| With a disability | 10.0%±0.3 pts | 10.8% | – |
| No health insurance coverage | 7.2%±0.4 pts | 7.5% | no clear change |
| High school graduate or higher (age 25+) | 89.2%±0.4 pts | 90.7% | – |
| Bachelor's degree or higher (age 25+) | 45.6%±0.5 pts | 43.6% | +2.0 pts |
| Graduate or professional degree (age 25+) | 19.4%±0.4 pts | 17.6% | – |
| Moved from another state in the past year | 2.0%±0.2 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 Middlesex County earn?
Half of Middlesex County's 307,782 households earn less than $111,549 a year (±$1,881), against $103,556 in New Jersey. In 2015-2019 it was $110,188 in 2024 dollars; the margins of error cannot tell the two periods apart. 8.6% of residents live below the poverty line.
| Measure | Middlesex County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $111,549±$1,881 | $103,556 | no clear change |
| Mean household income | $142,003±$1,471 | $143,363 | – |
| Per capita income | $50,601±$489 | $54,253 | +$1,867 |
| People below the poverty line | 8.6%±0.5 pts | 9.7% | no clear change |
| Children under 18 below the poverty line | 10.6%±0.9 pts | 13.0% | no clear change |
| Households receiving SNAP | 7.9%±0.5 pts | 9.1% | – |
| Households with a broadband subscription | 94.3%±0.4 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 Middlesex County?
Owners occupy 63.6% of Middlesex County's occupied homes and renters 36.4%. The median owner-occupied home is valued at $462,900 by its owner (±$2,710). The median renter pays $1,871 a month including utilities, and 38.8% of renters pay 35% or more of their income on rent.
| Measure | Middlesex County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $462,900±$2,710 | $454,400 | +$39,418 |
| Median gross rent | $1,871±$20 | $1,720 | +$63 |
| Renters paying 35% or more of income on rent | 38.8%±1.3 pts | 42.7% | no clear change |
| Median monthly owner costs, with a mortgage | $2,877±$24 | $2,829 | – |
| Owner-occupied homes | 63.6%±0.6 pts | 63.8% | no clear change |
| Housing units | 317,979±208 | 3,791,354 | +16,413 |
| Homeowner vacancy rate | 0.4%±0.1 pts | 0.7% | – |
| Rental vacancy rate | 2.4%±0.4 pts | 3.5% | – |
| Single-family detached homes | 52.4%±0.6 pts | 52.6% | – |
| Mobile homes | 0.8%±0.1 pts | 0.9% | – |
| Built 2020 or later | 0.9%±0.2 pts | 1.1% | – |
| Built 1939 or earlier | 10.4%±0.4 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 Middlesex County building?
Builders took permits for 1,476 new housing units across Middlesex County in 2025 (710 single-family), 1.7 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 Middlesex County get to work?
61.3% of Middlesex County's workers drive alone and 18.1% work from home. The average trip to work takes 31.2 minutes. The unemployment rate in 2020-2024 averaged 6.7%.
| Measure | Middlesex County | New Jersey | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 67.2%±0.4 pts | 66.4% | – |
| Unemployment rate | 6.7%±0.4 pts | 6.3% | +1.5 pts |
| Drove alone to work | 61.3%±0.8 pts | 62.2% | – |
| Carpooled | 8.1%±0.4 pts | 7.7% | – |
| Public transportation | 5.9%±0.3 pts | 8.1% | – |
| Walked | 2.9%±0.2 pts | 2.6% | – |
| Worked from home | 18.1%±0.6 pts | 16.8% | +13.6 pts |
| Mean travel time to work | 31.2 min±0.4 | 30.5 min | −3.2 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 Middlesex County's census tracts?
Middlesex County is divided into 192 census tracts. Among those with a reliable estimate, median household income runs from $40,807 (Tract 49) to $250,000 or more (Tract 14.15).
All 192 census tracts of Middlesex County, with their figures
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Middlesex County compare with New Jersey's other counties?
| Measure | Rank |
|---|---|
| Population | 2nd of 21 |
| Growth 2020-2025 | 12th of 21 |
| Residents per square mile | 6th of 21 |
| Median household income | 7th of 21 |
| Median home value | 9th of 21 |
| Median gross rent | 5th of 21 |
| Poverty rate | 12th of 21 |
| Bachelor's degree or higher | 7th of 21 |
| Median age | 14th 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 Middlesex 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.