21 Counties — new jersey
| County | Type | Population | Land area |
|---|
| atlantic | County | 252,552 | 561 sq mi |
| bergen | County | 884,118 | 234 sq mi |
| burlington | County | 423,394 | 805 sq mi |
| camden | County | 508,932 | 222 sq mi |
| cape may | County | 102,326 | 255 sq mi |
| cumberland | County | 146,438 | 489 sq mi |
| essex | County | 793,633 | 126 sq mi |
| gloucester | County | 254,673 | 325 sq mi |
| hudson | County | 608,975 | 47 sq mi |
| hunterdon | County | 121,989 | 430 sq mi |
| mercer | County | 350,761 | 226 sq mi |
| middlesex | County | 750,162 | 311 sq mi |
| monmouth | County | 615,301 | 472 sq mi |
| morris | County | 470,212 | 469 sq mi |
| ocean | County | 510,916 | 636 sq mi |
| passaic | County | 489,049 | 185 sq mi |
| salem | County | 64,285 | 338 sq mi |
| somerset | County | 297,490 | 305 sq mi |
| sussex | County | 144,166 | 521 sq mi |
| union | County | 522,541 | 103 sq mi |
| warren | County | 102,437 | 358 sq mi |