Union County, New Jersey
Union County is a county in New Jersey. Its county FIPS code is 34039. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 34039
- Representative coordinates
- 40.659871, -74.308696
- County type
- County
- County seat or government
- Elizabeth
- Resident population, July 2025
- 601,863
- Land area
- 266.165 km²
- Water area
- 6.84 km²
- State
- New Jersey
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Union County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| America/New_York | UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Listed zones overlap the mapped area. A point lookup can distinguish sides of a boundary. Your device’s zone may differ.
Census ZIP areas
07016 · 07023 · 07027 · 07033 · 07036 · 07060 · 07062 · 07063 · 07065 · 07066 · 07076 · 07081 · 07083 · 07088 · 07090 · 07092 · 07201 · 07202 · 07203 · 07204 · 07205 · 07206 · 07208 · 07901 · 07922 · 07974 · 08812
These statistical areas overlap the boundary. They are not delivery assignments; confirm mailing details with USPS ZIP Code Lookup.
Official county information
Use the US government local-office directory ↗ to find the office responsible for your address. A county website has not been confidently matched here. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Cities, towns and communities
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Connecticut Farms CDP, NJ
- Cranford CDP, NJ
- Elizabeth city, NJ
- Fanwood borough, NJ
- Garwood borough, NJ
- Kean University CDP, NJ
- Kenilworth borough, NJ
- Linden city, NJ
- Mountainside borough, NJ
- New Providence borough, NJ
- Plainfield city, NJ
- Rahway city, NJ
- Roselle borough, NJ
- Roselle Park borough, NJ
- Springfield CDP, NJ
- Summit city, New Jersey
- Union CDP, NJ
- Vauxhall CDP, NJ
- Westfield town, NJ
Areas sharing the mapped boundary
These areas touch this mapped boundary.
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county at your current point, check its ZIP area, or find its physical time zone.