County · New Jersey · United States
Union County ZIP codes
26 ZIP codes · 22 cities · FIPS 34039
Key facts
- State
- New Jersey (NJ)
- FIPS code
- 34039
- Population
- 572,549
- Median household income
- $100,117
- Median age
- 39.1
- Land area
- 102.8 sq mi (266.2 km²)
- Population density
- 5,571 / sq mi
- Area codes
- 201, 551, 732, 848, 862, 908, 973
Cities and ZIP codes in Union County (22)
About this page
County figures are Census county-level values (ACS 5-year); the ZIP list shows the ZIPs whose primary county this is — a ZIP on a border can also serve neighbouring counties.
Sources: U.S. Census Bureau (2020 county relationship file, ACS 5-year) · GeoNames. Methodology.