New Jersey County Map With Cities
By Marko Visic · Updated Oct 5, 2026
New Jersey has 21 counties, covering 7,355 square miles of land. The Census Bureau estimates its population at 9,548,215 as of July 1, 2025. The largest county by land area is Burlington County; the most populous is Bergen County; the least populous is Salem County.
Tap or click any county for details. Need a printable version? Blank New Jersey map (PDF/PNG/SVG).
All 21 New Jersey counties
| County | FIPS code | Population (July 1, 2025) ▼ | Change since April 2020 | Land area (sq mi) | People per sq mi | Median household income (2020–2024) |
|---|---|---|---|---|---|---|
| Bergen County | 34003 | 977,026 | +2.2% | 233 | 4,197 | $124,884 |
| Essex County | 34013 | 896,379 | +3.9% | 126 | 7,109 | $80,789 |
| Middlesex County | 34023 | 883,335 | +2.3% | 309 | 2,856 | $111,549 |
| Hudson County | 34017 | 735,033 | +1.4% | 46 | 15,912 | $91,795 |
| Ocean County | 34029 | 673,746 | +5.7% | 628 | 1,072 | $89,863 |
| Monmouth County | 34025 | 651,035 | +1.2% | 468 | 1,390 | $124,845 |
| Union County | 34039 | 601,863 | +4.6% | 103 | 5,857 | $103,202 |
| Camden County | 34007 | 535,799 | +2.3% | 221 | 2,420 | $88,755 |
| Passaic County | 34031 | 531,624 | +1.2% | 186 | 2,856 | $87,522 |
| Morris County | 34027 | 524,251 | +2.9% | 461 | 1,137 | $137,326 |
| Burlington County | 34005 | 481,439 | +4.2% | 799 | 602 | $108,111 |
| Mercer County | 34021 | 399,289 | +3.1% | 224 | 1,779 | $100,645 |
| Somerset County | 34035 | 356,486 | +3.2% | 302 | 1,181 | $140,374 |
| Gloucester County | 34015 | 312,638 | +3.4% | 322 | 971 | $105,115 |
| Atlantic County | 34001 | 278,657 | +1.5% | 556 | 502 | $78,050 |
| Cumberland County | 34011 | 157,148 | +1.9% | 483 | 325 | $67,436 |
| Sussex County | 34037 | 148,063 | +2.7% | 518 | 286 | $116,186 |
| Hunterdon County | 34019 | 131,781 | +2.2% | 428 | 308 | $141,715 |
| Warren County | 34041 | 112,953 | +3.0% | 357 | 317 | $100,869 |
| Cape May County | 34009 | 93,390 | -2.0% | 252 | 371 | $91,128 |
| Salem County | 34033 | 66,280 | +2.2% | 332 | 200 | $79,960 |
FIPS code: the Census Bureau’s five-digit county ID, a two-digit state code plus a three-digit county code. It is not a ZIP code.
How many counties does New Jersey have?
New Jersey has 21 counties covering 7,355 square miles. The state was admitted to the Union in 1787 as the 3rd state.
The largest county by land area is Burlington County at 799 square miles, home to 481,439 residents. The most populous is Bergen County with 977,026 residents — a density of 4,197 people per square mile. At the other end of the scale, Salem County has 66,280 residents.
New Jersey’s capital is Trenton, while the largest city is Newark.
Related resources
Download a printable outline of New Jersey’s county boundaries from our blank map of New Jersey page — available in SVG, PNG, and PDF.
Use the What County Am I In? tool to detect which New Jersey county a GPS location or address falls in, or the Address to County Lookup for batch input.
For demographic radius analysis, the Find ZIP Codes in Radius and Population Within Radius tools let you draw a circle around any New Jersey address and see every ZIP code and the total population inside.
Two SimpleMapLab studies cover New Jersey specifically: the 100-mile radius around Trenton measures how much of the state lives within 100 miles of its capitol, and the loneliest town in New Jersey ranks the state’s most isolated inhabited place. The county-counts blog post puts New Jersey’s 21 counties in national context.
Frequently asked questions
- County Population Totals, Vintage 2025: estimates for July 1, 2025, released March 2026
- Gazetteer Files, 2026: county land and water area
- American Community Survey 5-Year Estimates, 2020–2024: median household income (table B19013)
- County boundaries on the map: US Atlas TopoJSON build of the US Census Bureau’s TIGER/Line shapefiles. All figures are US Census Bureau data in the public domain.