Middlesex County, New Jersey ZIP codes
45 ZIP codes are in Middlesex County, plus 8 that cross in from neighboring counties. It's part of the New York-Newark-Jersey City, NY-NJ metro area.
- ZIP codes
- 45
- Population in these ZIPs
- 881,625
- Avg. median income
- $113,300population-weighted
- Cities & towns
- 34
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Middlesex County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 07001 | Avenel | 17,121 | $101,670 | $513,200 |
| 07008 | Carteret | 25,526 | $97,021 | $560,400 |
| 07064 | Port Reading | 3,481 | $133,854 | $542,300 |
| 07067 | Colonia | 18,587 | $122,713 | $639,200 |
| 07077 | Sewaren | 3,248 | $108,948 | $534,100 |
| 07080 | South Plainfield | 24,411 | $130,205 | $581,300 |
| 07095 | Woodbridge | 20,756 | $104,926 | $478,600 |
| 07747 | Matawan | 32,330 | $124,383 | $657,700 |
| 08512 | Cranbury | 12,928 | $118,587 | $749,900 |
| 08536 | Plainsboro | 20,817 | $137,607 | $661,700 |
| 08810 | Dayton | 7,952 | $151,902 | $643,200 |
| 08816 | East Brunswick | 49,360 | $143,586 | $626,000 |
| 08817 | Edison | 49,020 | $110,808 | $558,300 |
| 08818 PO Box | Edison | — | — | — |
| 08820 | Edison | 39,978 | $171,363 | $817,600 |
| 08824 | Kendall Park | 13,366 | $174,776 | $725,000 |
| 08828 | Helmetta | 2,459 | $98,952 | $425,500 |
| 08830 | Iselin | 19,551 | $109,500 | $553,900 |
| 08831 | Monroe Township | 55,658 | $109,042 | $603,700 |
| 08832 | Keasbey | 2,252 | — | $278,800 |
| 08837 | Edison | 19,437 | $102,605 | $524,900 |
| 08840 | Metuchen | 18,206 | $146,635 | $687,600 |
| 08846 | Middlesex | 14,645 | $105,000 | $543,400 |
| 08850 | Milltown | 8,538 | $141,601 | $609,500 |
| 08852 | Monmouth Junction | 18,062 | $133,209 | $694,500 |
| 08854 | Piscataway | 61,088 | $127,806 | $595,600 |
| 08855 PO Box | Piscataway | — | — | — |
| 08857 | Old Bridge | 40,891 | $109,312 | $632,700 |
| 08859 | Parlin | 25,448 | $99,882 | $545,300 |
| 08861 | Perth Amboy | 59,351 | $64,491 | $493,300 |
| 08862 PO Box | Perth Amboy | — | — | — |
| 08863 | Fords | 12,771 | $115,861 | $529,500 |
| 08871 PO Box | Sayreville | — | — | — |
| 08872 | Sayreville | 20,204 | $97,489 | $526,600 |
| 08879 | South Amboy | 23,556 | $92,786 | $521,400 |
| 08882 | South River | 16,124 | $96,147 | $532,100 |
| 08884 | Spotswood | 8,187 | $104,702 | $562,500 |
| 08899 PO Box | Edison | — | — | — |
| 08901 | New Brunswick | 57,263 | $65,810 | $439,900 |
| 08902 | North Brunswick | 43,932 | $121,071 | $543,900 |
| 08903 PO Box | New Brunswick | — | — | — |
| 08904 | Highland Park | 15,121 | $104,694 | $591,000 |
| 08906 PO Box | New Brunswick | — | — | — |
| 08933 PO Box | New Brunswick | — | — | — |
| 08989 PO Box | New Brunswick | — | — | — |
ZIP codes partly in Middlesex County
These ZIP codes are mostly in a neighboring county but cover part of Middlesex County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 07060 | Plainfield | Union County | 48,363 | $78,602 | $526,800 |
| 07063 | Plainfield | Union County | 14,235 | $93,304 | $489,800 |
| 07721 | Cliffwood | Monmouth County | 4,277 | $123,060 | $520,200 |
| 07726 | Englishtown | Monmouth County | 44,764 | $149,197 | $792,200 |
| 07735 | Keyport | Monmouth County | 19,159 | $97,536 | $517,800 |
| 08528 | Kingston | Somerset County | 321 | — | $233,500 |
| 08540 | Princeton | Mercer County | 50,388 | $176,983 | $963,100 |
| 08812 | Dunellen | Somerset County | 14,224 | $118,316 | $583,800 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Middlesex County
- Avenel
- Carteret
- Port Reading
- Colonia
- Sewaren
- South Plainfield
- Woodbridge
- Matawan
- Cranbury
- Plainsboro
- Dayton
- East Brunswick
- Edison
- Kendall Park
- Helmetta
- Iselin
- Monroe Township
- Keasbey
- Metuchen
- Middlesex
- Milltown
- Monmouth Junction
- Piscataway
- Old Bridge
- Parlin
- Perth Amboy
- Fords
- Sayreville
- South Amboy
- South River
- Spotswood
- New Brunswick
- North Brunswick
- Highland Park
Nearby counties
Frequently asked questions
How many ZIP codes are in Middlesex County, New Jersey?
45 ZIP codes are mainly in Middlesex County, and 8 more ZIP codes from neighboring areas reach partly into it.
What cities are in Middlesex County?
ZIP codes in Middlesex County use the city names Avenel, Carteret, Colonia, Cranbury, Dayton, East Brunswick, Edison, Fords, Helmetta, Highland Park, Iselin and Keasbey and others.
What metro area is Middlesex County in?
Middlesex County is part of the New York-Newark-Jersey City, NY-NJ metropolitan statistical area.