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Where am ILOCATED

Union County, New Jersey

Union County, New Jersey, has 601,863 residents (July 2025 estimate). Its county seat is Elizabeth. It uses Eastern Time and covers 103 sq mi (266 km²) of land.

NewarkPaterson
Union County in New Jersey
ElizabethPlainfieldLindenWestfieldRahway
Union County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
601,863
Land area
103 sq mi (266 km²)
County seat or government
Elizabeth
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income
$103,202 ± $2,659
Median home value
$529,200 ± $8,258
Median rent, with utilities
$1,730 ± $23
Homes lived in by their owners
57.4% ± 0.8 points
County type
County
Metro or micro area
New York-Newark-Jersey City, NY-NJ metro areaCentral county
Water area
2.64 sq mi (6.84 km²)
State
New Jersey
County code (FIPS)
34039
Coordinates (central point)
40.659871, -74.308696
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Union County

Time zoneLocal time and UTC offsetNext clock change
Eastern TimeAmerica/New_YorkUTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 0708358,170 people
  2. 0706048,363 people
  3. 0703645,671 people
  4. 0720244,968 people
  5. 0720831,937 people
  6. 0720631,930 people
  7. 0709031,111 people
  8. 0706530,109 people
  9. 0720128,467 people
  10. 0707624,843 people
  11. 0790124,314 people
  12. 0701624,074 people
All 27
  1. 0720322,646 people
  2. 0720522,349 people
  3. 0708117,171 people
  4. 0706615,622 people
  5. 0706215,399 people
  6. 0706314,235 people
  7. 0881214,224 people
  8. 0720414,093 people
  9. 0797413,349 people
  10. 0792212,195 people
  11. 070338,401 people
  12. 070237,799 people
  13. 070927,049 people
  14. 070274,885 people
  15. 070882,901 people

27 ZIP Code areas overlap Union County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Union County, largest first

  1. Union Township61,071 people
  2. Scotch Plains Township24,843 people
  3. Cranford Township24,074 people
  4. Hillside Township22,349 people
  5. Springfield Township17,171 people
  6. Clark Township15,622 people
  7. Berkeley Heights Township13,426 people
  8. Winfield Township1,479 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in New Jersey, by county

School districts in Union County, largest first

  1. Elizabeth City School District137,302 people
  2. Union Township School District (Union County)61,071 people
  3. Plainfield City School District55,236 people
  4. Linden City School District44,192 people
  5. Scotch Plains-Fanwood Regional School District32,642 people
  6. Westfield Town School District31,111 people
  7. Rahway City School District30,109 people
  8. Cranford Township School District24,074 people
  9. Summit City School District22,705 people
  10. Roselle Borough School District22,646 people
  11. Hillside Township School District22,349 people
  12. Springfield Township School District (Union County)17,171 people
All 20
  1. Clark Township School District15,622 people
  2. Roselle Park Borough School District14,093 people
  3. New Providence Borough School District13,727 people
  4. Berkeley Heights Township School District13,426 people
  5. Kenilworth Borough School District8,401 people
  6. Mountainside Borough School District7,049 people
  7. Garwood Borough School District4,885 people
  8. Winfield Township School District1,479 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Elizabeth, New Jersey (city)137,302 people
  2. Plainfield, New Jersey (city)55,236 people
  3. Linden, New Jersey (city)44,192 people
  4. Westfield, New Jersey (town)31,111 people
  5. Rahway, New Jersey (city)30,109 people
  6. Summit, New Jersey (city)22,705 people
  7. Roselle, New Jersey (borough)22,646 people
  8. Roselle Park, New Jersey (borough)14,093 people
  9. New Providence, New Jersey (borough)13,727 people
  10. Kenilworth, New Jersey (borough)8,401 people
  11. Fanwood, New Jersey (borough)7,799 people
  12. Mountainside, New Jersey (borough)7,049 people
All 19
  1. Vauxhall, New Jersey (CDP)6,157 people
  2. Garwood, New Jersey (borough)4,885 people
  3. Union, New Jersey (CDP)2,774 people
  4. Cranford, New Jersey (CDP)1,937 people
  5. Kean University, New Jersey (CDP)1,362 people
  6. Springfield, New Jersey (CDP)1,304 people
  7. Connecticut Farms, New Jersey (CDP)516 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Essex County, New Jersey9.4 mi north
  2. Richmond County, New York11 mi southeast
  3. Hudson County, New Jersey13 mi east
  4. Middlesex County, New Jersey16 mi south
  5. Somerset County, New Jersey18 mi west
  6. Morris County, New Jersey19 mi northwest

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 where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.