List of counties in New Jersey
The US state of New Jersey is divided into 21 counties .
| No. * | county | Resident July 1, 2017 | Population census 2010 | Administrative headquarters |
|---|---|---|---|---|
| 1 | Atlantic | 269,918 | 274,540 | Mays Landing |
| 2 | Mountains | 948.406 | 905.147 | Hoe sack |
| 3 | Burlington | 448,596 | 448,738 | Mount Holly |
| 4th | Camden | 510.719 | 513,668 | Camden |
| 5 | Cape May | 93,553 | 97.265 | Cape May Court House |
| 6th | Cumberland | 152,538 | 156,628 | Bridgeton |
| 7th | Essex | 808.285 | 783.999 | Newark |
| 8th | Gloucester | 292.206 | 288,585 | Woodbury |
| 9 | Hudson | 691,643 | 634.244 | Jersey City |
| 10 | Hunterdon | 125.059 | 127.364 | Flemington |
| 11 | Mercer | 374.733 | 367,517 | Trenton |
| 12 | Middlesex | 842,798 | 809.864 | New Brunswick |
| 13 | Monmouth | 626.351 | 630,423 | Freehold |
| 14th | Morris | 499,693 | 492.315 | Morristown |
| 15th | Ocean | 597.943 | 576,548 | Toms River |
| 16 | Passaic | 512.607 | 501,622 | Paterson |
| 17th | Salem | 62,792 | 66,069 | Salem |
| 18th | Somerset | 335,432 | 323,428 | Somerville |
| 19th | Sussex | 141,682 | 148,886 | Newton |
| 20th | union | 563,892 | 536,448 | Elizabeth |
| 21st | Warren | 106,798 | 108,655 | Belvidere |
* Numbering is as shown on the map