New Jersey County Map
Labeled county boundary map and complete directory of all 21 counties in New Jersey (NJ, State FIPS 34). View 5-digit FIPS codes, county seats, land area in square miles, and official county government websites below.
Showing all 21 counties in New Jersey. Use the search box below to filter by county name, 5-digit FIPS code, or county seat.
New Jersey County Statistics & Summary
Total Counties
21
Largest by Land Area
Burlington County
Smallest by Land Area
Hudson County
All 21 Counties in New Jersey (FIPS, County Seat & Official Website)
| County Name | 5-Digit FIPS | Seat / Administrative Center | Land Area (sq mi) | Coordinates | Official Website |
|---|---|---|---|---|---|
| Atlantic County | 34001 | Mays Landing | 555.6 | 39.469°, -74.634° | Official Site |
| Bergen County | 34003 | Hackensack | 232.8 | 40.960°, -74.075° | Official Site |
| Burlington County | 34005 | Mount Holly | 799.3 | 39.876°, -74.663° | Official Site |
| Camden County | 34007 | Camden | 221.4 | 39.802°, -74.962° | Official Site |
| Cape May County | 34009 | Middle Township | 251.5 | 39.086°, -74.846° | Official Site |
| Cumberland County | 34011 | Bridgeton | 483.4 | 39.328°, -75.122° | Official Site |
| Essex County | 34013 | Newark | 126.1 | 40.787°, -74.246° | Official Site |
| Gloucester County | 34015 | Woodbury | 322 | 39.723°, -75.145° | Official Site |
| Hudson County | 34017 | Jersey City | 46.2 | 40.731°, -74.079° | Official Site |
| Hunterdon County | 34019 | Flemington | 427.8 | 40.565°, -74.912° | Official Site |
| Mercer County | 34021 | Trenton | 224.5 | 40.282°, -74.704° | Official Site |
| Middlesex County | 34023 | New Brunswick | 309.3 | 40.440°, -74.407° | Official Site |
| Monmouth County | 34025 | Freehold | 468.2 | 40.287°, -74.152° | Official Site |
| Morris County | 34027 | Morristown | 461 | 40.859°, -74.547° | Official Site |
| Ocean County | 34029 | Toms River | 628.3 | 39.863°, -74.256° | Official Site |
| Passaic County | 34031 | Paterson | 186.1 | 41.037°, -74.299° | Official Site |
| Salem County | 34033 | Salem | 331.9 | 39.574°, -75.357° | Official Site |
| Somerset County | 34035 | Somerville | 301.9 | 40.566°, -74.620° | Official Site |
| Sussex County | 34037 | Newton | 518.5 | 41.136°, -74.695° | Official Site |
| Union County | 34039 | Elizabeth | 102.8 | 40.660°, -74.309° | Official Site |
| Warren County | 34041 | Belvidere | 356.5 | 40.853°, -75.010° | Official Site |
How New Jersey Counties and 5-Digit FIPS Codes Work
In U.S. Census Bureau TIGER/Line geography, New Jersey (NJ) is assigned the 2-digit state Federal Information Processing Series (FIPS) code 34 and covers 7,355 square miles of land area across 21 counties in the Eastern Time (ET) zone (with Trenton as the state capital). Every county in the directory above carries a unique 5-digit GEOID formed by combining state prefix 34 with a 3-digit county code (ranging alphabetically from Atlantic County at 34001 to Warren County at 34041).
Because U.S. Postal Service 5-digit ZIP Codes follow mail carrier delivery routes rather than local government borders, many postal addresses in New Jersey carry a neighboring city’s mailing name or sit inside a multi-county ZIP Code Tabulation Area (ZCTA). Property tax assessments, deed recording, circuit and county court venue, voter registration precincts, sheriff jurisdiction, and county sales tax rates in New Jersey are determined by the legal county boundary shown on the map above rather than the postal city name on an envelope.
Land area figures in square miles and internal centroid coordinates (INTPTLAT, INTPTLON) come directly from the U.S. Census Bureau’s current TIGERweb State_County benchmark, while 21 administrative seats and 21 verified official government websites are cross-referenced from Wikidata (CC0). Need a clean outline worksheet without county labels, or want to verify which New Jersey county a specific home or business address sits in? Open the Blank Map of New Jersey, run a street-segment check on Address to County Lookup, check multi-county postal overlap on ZIP Code to County Lookup, or browse all 50 states on the National U.S. County Map.
Adjacent State County Maps
Explore county maps and FIPS directories for states bordering New Jersey: