About New Jersey Map
The New Jersey county map shows all the 21 counties of the state of New Jersey and also shows county seats and state capital.
List of Counties of New Jersey
| County | FIPS Code | County Seat | Largest City | Established in | Population Density (per mi2) | Population | Area (sq mi) | Area (km2) |
|---|---|---|---|---|---|---|---|---|
| Atlantic County | 1 | Mays Landing | Galloway Township | 1837 | 489.39 | 263,670 | 561 | 1,453 |
| Bergen County | 3 | Hackensack | Hackensack | 1683 | 3,868.02 | 932,202 | 234 | 606 |
| Burlington County | 5 | Mount Holly | Evesham Township | 1694 | 557.43 | 445,349 | 805 | 2,085 |
| Camden County | 7 | Camden | Camden | 1844 | 2,313.77 | 506,471 | 222 | 575 |
| Cape May County | 9 | Cape May Court House | Lower Township | 1692 | 381.43 | 92,039 | 255 | 660 |
| Cumberland County | 11 | Bridgeton | Vineland | 1748 | 320.85 | 149,527 | 489 | 1,267 |
| Essex County | 13 | Newark | Newark | 1683 | 6,221.98 | 798,975 | 126 | 326 |
| Gloucester County | 15 | Woodbury | Washington Township | 1686 | 887.04 | 291,636 | 325 | 842 |
| Hudson County | 17 | Jersey City | Jersey City | 1840 | 13,495.02 | 672,391 | 47 | 122 |
| Hunterdon County | 19 | Flemington | Raritan Township | 1714 | 298.49 | 124,371 | 430 | 1,114 |
| Mercer County | 21 | Trenton | Hamilton Township | 1838 | 1,621.74 | 367,430 | 226 | 585 |
| Middlesex County | 23 | New Brunswick | Edison | 1683 | 2,604.05 | 825,062 | 311 | 805 |
| Monmouth County | 25 | Freehold Borough | Middletown Township | 1683 | 1,335.55 | 618,795 | 472 | 1,222 |
| Morris County | 27 | Morristown | Parsippany-Troy Hills | 1739 | 1,049.63 | 491,845 | 469 | 1,215 |
| Ocean County | 29 | Toms River | Lakewood Township | 1850 | 629.44 | 607,186 | 636 | 1,647 |
| Passaic County | 31 | Paterson | Paterson | 1837 | 2,709.33 | 501,826 | 185 | 479 |
| Salem County | 33 | Salem | Pennsville Township | 1694 | 195.51 | 62,385 | 338 | 875 |
| Somerset County | 35 | Somerville | Franklin Township | 1688 | 1,060.47 | 328,934 | 305 | 790 |
| Sussex County | 37 | Newton | Vernon Township | 1753 | 286.5 | 140,488 | 521 | 1,349 |
| Union County | 39 | Elizabeth | Elizabeth | 1857 | 5,208.73 | 556,341 | 103 | 267 |
| Warren County | 41 | Belvidere | Phillipsburg | 1824 | 303.61 | 105,267 | 358 | 927 |