Middlesex County, New Jersey
Middlesex County, New Jersey
| Census | Population |
|---|---|
| 2000 | 750,162 |
| 2010 | 809,858 |
| 2020 | 863,162 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, county level, state 34, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county level, state 34, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county level, state 34, retrieved November 14, 2026.
| Measure | Middlesex County | New Jersey |
|---|---|---|
| Population | 861,535 | 9,267,014 |
| Median household income | $109,028 | $101,050 |
| Median age | 39.4 | 40.1 |
| Median home value | $439,300 | $427,600 |
| Bachelor’s degree or higher | 45.1% | 42.9% |
| Foreign-born residents | 34.7% | 23.5% |
| Owner-occupied homes | 63.5% | 63.7% |
| Mean commute to work | 31.9 minutes | 30.9 minutes |
Source: American Community Survey 5-year data profile 2019–2023, county level, state 34, retrieved November 14, 2026.
Median household income $109,028 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, county level, state 34, retrieved November 14, 2026.
- Owner occupied
- 193,963 units
- Renter occupied
- 111,647 units
- Vacancy rate
- 3.5%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, county level, state 34, retrieved November 14, 2026.
434,143 employees in 22,314 establishments with payroll in 2023, all sectors; employers themselves are not named in the source. County Business Patterns counts are published with noise.
Source: County Business Patterns 2023: employment by sector, county level, state 34, retrieved November 14, 2026.
Townships, towns and villages in Middlesex County
- AvenelCensus designated place
- BrownvilleCensus designated place
- CarteretBorough
- ClearbrookCensus designated place
- ColoniaCensus designated place
- ConcordiaCensus designated place
- Cranbury TownshipTownship
- CranburyCensus designated place
- DaytonCensus designated place
- DeansCensus designated place
- DunellenBorough
- East Brunswick TownshipTownship
- Edison TownshipTownship
- Encore at MonroeCensus designated place
- FordsCensus designated place
- ForsgateCensus designated place
- HeathcoteCensus designated place
- HelmettaBorough
- Highland ParkBorough
- HopelawnCensus designated place
- IselinCensus designated place
- JamesburgBorough
- KeasbeyCensus designated place
- Kendall ParkCensus designated place
- Laurence HarborCensus designated place
- Madison ParkCensus designated place
- Menlo Park TerraceCensus designated place
- MetuchenBorough
- MiddlesexBorough
- MilltownBorough
- Monmouth JunctionCensus designated place
- Monroe TownshipTownship
- Monroe ManorCensus designated place
- New BrunswickCity
- North Brunswick TownshipTownship
- Old Bridge TownshipTownship
- Old BridgeCensus designated place
- Perth AmboyCity
- Piscataway TownshipTownship
- Plainsboro TownshipTownship
- Plainsboro CenterCensus designated place
- Port ReadingCensus designated place
- Princeton MeadowsCensus designated place
- Regency at MonroeCensus designated place
- Renaissance at MonroeCensus designated place
- RossmoorCensus designated place
- Rutgers University-Busch CampusCensus designated place
- Rutgers University-Livingston CampusCensus designated place
- SayrevilleBorough
- SewarenCensus designated place
- South AmboyCity
- South Brunswick TownshipTownship
- South PlainfieldBorough
- South RiverBorough
- SpotswoodBorough
- StonebridgeCensus designated place
- The PondsCensus designated place
- WhittinghamCensus designated place
- Woodbridge TownshipTownship
- WoodbridgeCensus designated place
Neighboring counties
- Mercer CountyPopulation 392,138 (2024 estimate)
- Monmouth CountyPopulation 647,520 (2024 estimate)
- Richmond County, NYNo page yet
- Somerset CountyPopulation 357,467 (2024 estimate)
- Union CountyPopulation 594,160 (2024 estimate)
Sources: Census county adjacency file 2024, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 34, retrieved November 14, 2026.
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- Type
- County
- Land area
- 309.3 sq mi
- Water area
- 13.6 sq mi
- Population
- 890,119 (2024 estimate)
- Households
- 305,610
- Median age
- 39.4
- Median household income
- $109,028
- Median home value
- $439,300
- Median gross rent
- $1,810
- Owner-occupied homes
- 63.5%
- Bachelor’s degree or higher
- 45.1%
- Foreign-born residents
- 34.7%
- Mean commute to work
- 31.9 minutes
- Census GEOID
- 34023
Sources: Census Gazetteer 2025: counties, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 34, retrieved November 14, 2026; American Community Survey 5-year data profile 2019–2023, county level, state 34, retrieved November 14, 2026.
- ZIP codes
- 07001, 07008, 07064, 07067, 07077, 07080, 07095, 07721, 07735, 07747, 08512, 08528, 08536, 08540, 08810, 08812, 08816, 08817, 08820, 08824, 08828, 08830, 08831, 08832, 08837, 08840, 08846, 08850, 08852, 08854, 08857, 08859, 08861, 08863, 08872, 08879, 08882, 08884, 08901, 08902, 08904
- Metro area
- New York-Newark-Jersey City, NY-NJ
Sources: Census 2020 ZCTA relationship file: ZCTAs to counties, retrieved November 14, 2026; Census Gazetteer 2025: metropolitan and micropolitan areas, retrieved November 14, 2026.