| ZIP Codes: | 30 ZIP Codes (26 Standard, 4 PO Box, 0 Unique) [See All] |
| Area Codes: | 732 / 848 / 862 / 908 / 973 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 11:54:29 PM |
| Population: | 602,051 [See All] |
| FIPS: | 34039 |
| CBSA: | New York-Newark-Jersey City, NY-NJ |
| Land Area: | 105 sq mi |
| Water Area: | 3 sq mi |
| Coordinates: | 40.6611, -74.3141 |
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602,051 residents live across 30 ZIPs covering 105 sq mi, served by 22 distinct USPS-recognized cities.
Population moved from 567,134 to 602,051 from 2014 to 2024 — a +6.2% change. 23 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 07090 (Westfield, $232,629 median) and poorest ZIP 07201 (Elizabeth, $60,080) are 10.2 miles apart — a 3.9× income gap across local geography.
Median home values vary 2.9× across this county — from $346,000 in 07088 (Vauxhall) to $987,900 in 07901 (Summit).
Density varies 11× across the county — from 1,684 people/sq mi in 07092 (Mountainside) to 18,685 in 07202 (Elizabeth).
Educational attainment ranges from 9.4% bachelor's+ in 07206 (Elizabethport) to 78.1% in 07090 (Westfield) — the breadth of educational profiles across the area.
Within New Jersey, this is the #7 most populous of 21 counties and ranks #6 for median household income with the #6 fastest decade growth .
On the national stage, Union County is ranks #68 for income .
Weighted by population, the typical household earns about $116,335 across the county — reflecting what a typical resident sees, not a simple ZIP average.
38.3% of adults age 25+ hold a bachelor's degree or higher (157,103 of 409,857 reporting).
26 Standard delivery, 4 PO Box only, 0 single-entity Unique ZIPs serve this county.
9 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
Median household income spans 3.9× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 07083 | Union | Standard | 58,170 | $121,887 | 8.8 | 8.1% |
| 07060 | Plainfield | Standard | 48,363 | $78,602 | 5.1 | 5.6% |
| 07036 | Linden | Standard | 45,671 | $91,882 | 11.1 | 7.4% |
| 07202 | Elizabeth | Standard | 44,968 | $71,250 | 2.4 | 6.6% |
| 07208 | Elizabeth | Standard | 31,937 | $65,511 | 1.8 | -0.7% |
| 07206 | Elizabethport | Standard | 31,930 | $68,420 | 1.7 | 15.5% |
| 07090 | Westfield | Standard | 31,111 | $232,629 | 6.8 | 1.2% |
| 07065 | Rahway | Standard | 30,109 | $91,461 | 3.9 | 7.6% |
| 07201 | Elizabeth | Standard | 28,467 | $60,080 | 5.4 | 14.1% |
| 07076 | Scotch Plains | Standard | 24,843 | $183,655 | 9.2 | 4.6% |
| 07901 | Summit | Standard | 24,314 | $179,701 | 6.2 | 5.9% |
| 07016 | Cranford | Standard | 24,074 | $155,972 | 4.9 | 4.0% |
| 07203 | Roselle | Standard | 22,646 | $92,762 | 2.6 | 6.1% |
| 07205 | Hillside | Standard | 22,349 | $99,528 | 2.8 | 3.1% |
| 07081 | Springfield | Standard | 17,171 | $155,906 | 5.2 | 2.6% |
| 07066 | Clark | Standard | 15,622 | $133,504 | 4.4 | 3.8% |
| 07062 | Plainfield | Standard | 15,399 | $98,344 | 1.9 | 22.4% |
| 07063 | Plainfield | Standard | 14,235 | $93,304 | 1.7 | 2.0% |
| 07204 | Roselle Park | Standard | 14,093 | $109,679 | 1.2 | 4.7% |
| 07974 | New Providence | Standard | 13,349 | $172,894 | 4.0 | 9.7% |
| 07922 | Berkeley Heights | Standard | 12,195 | $202,944 | 5.7 | -1.5% |
| 07033 | Kenilworth | Standard | 8,401 | $118,611 | 2.2 | 4.4% |
| 07023 | Fanwood | Standard | 7,799 | $195,529 | 1.3 | 4.3% |
| 07092 | Mountainside | Standard | 7,049 | $211,538 | 4.2 | 4.2% |
| 07027 | Garwood | Standard | 4,885 | $110,670 | 0.7 | 13.0% |
| 07088 | Vauxhall | Standard | 2,901 | $93,240 | 0.3 | -17.2% |
| 07902 | Summit | PO Box | — | — | 0.0 | — |
| 07061 | Plainfield | PO Box | — | — | 0.0 | — |
| 07207 | Elizabeth | PO Box | — | — | 0.0 | — |
| 07091 | Westfield | PO Box | — | — | 0.0 | — |