New Jersey Counties
Complete list of all 21 counties in New Jersey with population, area, median income, and county seats — plus a free printable blank map.
Labeled outline map of New Jersey counties. Download a printable version in SVG, PNG, or PDF.
All 21 New Jersey counties
| County | County Seat | Population ▼ | Area | Median Income | Cities |
|---|---|---|---|---|---|
| Bergen | — | 962,316 | 233 mi² | $136,315 | 66 |
| Middlesex | — | 881,625 | 309 mi² | $113,304 | 35 |
| Essex | — | 863,415 | 126 mi² | $98,162 | 21 |
| Hudson | — | 718,323 | 46 mi² | $98,497 | 10 |
| Ocean | — | 653,364 | 629 mi² | $91,599 | 27 |
| Monmouth | — | 628,975 | 469 mi² | $132,981 | 53 |
| Union | — | 602,051 | 103 mi² | $116,335 | 22 |
| Camden | — | 542,442 | 221 mi² | $93,055 | 30 |
| Passaic | — | 520,540 | 185 mi² | $90,791 | 16 |
| Morris | — | 504,048 | 460 mi² | $146,308 | 52 |
| Burlington | — | 463,909 | 799 mi² | $112,716 | 33 |
| Mercer | — | 395,671 | 225 mi² | $113,677 | 10 |
| Somerset | — | 328,603 | 302 mi² | $154,836 | 30 |
| Gloucester | — | 288,467 | 322 mi² | $107,014 | 27 |
| Atlantic | — | 273,149 | 556 mi² | $80,594 | 28 |
How many counties does New Jersey have?
New Jersey has 21 counties covering 7,354 square miles and roughly 9,343,809 residents. The state was admitted to the Union in 1787 as the 3rd state, and the current county boundaries reflect more than a century of administrative subdivision.
The largest county by land area is Burlington County at 799 square miles, home to about 463,909 residents. The most populous is Bergen County with approximately 962,316 residents — a density of about 4,130 people per square mile.
At the other end of the scale, Salem County has only about 66,511 residents.
New Jersey’s capital is Trenton, while the largest city is Newark — a common pattern in the United States, where many states placed their capitals in smaller, more central towns rather than their largest commercial hubs.
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
Population and demographics are aggregated from ZIP-code-level US Census data via the SimpleMaps dataset. Countiesboundaries are from the US Atlas TopoJSON build of the Census Bureau’s TIGER/Line shapefiles. Land area is from the Census Gazetteer. State counts follow the US Census Bureau’s definition of counties and county-equivalents (50 states + DC = 3,143). All sources are public domain.