Founded in 1837, Passaic County is one of 21 counties in the state of New Jersey. Historically, Passaic County was formed from Bergen County and Essex County. The city of Paterson is the county seat. With FIPS code of 31, Passaic County has a population of 518,117 and area of 185 square miles (479 km2).
List of all cities in Passaic County, NJ alphabetically
| City/Town | Postal Code | Area Code |
| Allwood, NJ | 07012 | 973/862 |
| Awosting, NJ | 07421 | 973/862 |
| Bloomingdale, NJ | 07403 | 973/862 |
| Clifton, NJ | 07011 | 973/862 |
| 07012 | 973/862 | |
| 07013 | 973/862 | |
| 07014 | 973/862 | |
| 07015 | 973/862 | |
| Cozy Lake, NJ | 07438 | 973/862 |
| Cupsaw Lake, NJ | 07456 | 973/862 |
| Delawanna, NJ | 07014 | 973/862 |
| Dundee, NJ | 07055 | 973/862 |
| Erskine, NJ | 07456 | 973/862 |
| Erskine Lakes, NJ | 07456 | 973/862 |
| Gordon Lakes, NJ | 07480 | 973/862 |
| Great Notch, NJ | 07424 | 973/862 |
| Green Pond, NJ | 07435 | 973/862 |
| Greenwood Lake, NJ | 07421 | 973/862 |
| Haledon, NJ | 07508 | 973/862 |
| 07538 | 973/862 | |
| Haskell, NJ | 07420 | 973/862 |
| Hawthorne, NJ | 07506 | 973/862 |
| 07507 | 973/862 | |
| Hewitt, NJ | 07421 | 973/862 |
| Hillcrest, NJ | 07502 | 973/862 |
| Jefferson Township, NJ | 07438 | 973/862 |
| Lake Swannanoa, NJ | 07438 | 973/862 |
| Lionshead Lake, NJ | 07470 | 973/862 |
| Little Falls, NJ | 07424 | 973/862 |
| Main Avenue Station, NJ | 07011 | 973/862 |
| Midvale, NJ | 07465 | 973/862 |
| Mountain View, NJ | 07470 | 973/862 |
| Newfoundland, NJ | 07435 | 973/862 |
| North Haledon, NJ | 07508 | 973/862 |
| 07538 | 973/862 | |
| Oak Ridge, NJ | 07438 | 973/862 |
| Packanack Lake, NJ | 07470 | 973/862 |
| Passaic, NJ | 07055 | 973/862 |
| Passaic Park, NJ | 07055 | 973/862 |
| Paterson, NJ | 07501 | 973/862 |
| 07502 | 973/862 | |
| 07503 | 973/862 | |
| 07504 | 973/862 | |
| 07505 | 973/862 | |
| 07506 | 973/862 | |
| 07507 | 973/862 | |
| 07508 | 973/862 | |
| 07509 | 973/862 | |
| 07510 | 973/862 | |
| 07511 | 973/862 | |
| 07512 | 973/862 | |
| 07513 | 973/862 | |
| 07514 | 973/862 | |
| 07522 | 973/862 | |
| 07524 | 973/862 | |
| 07533 | 973/862 | |
| 07538 | 973/862 | |
| 07543 | 973/862 | |
| 07544 | 973/862 | |
| Peoples Park, NJ | 07513 | 973/862 |
| 07543 | 973/862 | |
| Pine Cliff Lake, NJ | 07480 | 973/862 |
| Pines Lake, NJ | 07470 | 973/862 |
| Pompton Falls, NJ | 07442 | 973/862 |
| Pompton Lakes, NJ | 07442 | 973/862 |
| Preakness, NJ | 07470 | 973/862 |
| Prospect Park, NJ | 07508 | 973/862 |
| 07538 | 973/862 | |
| Ringwood, NJ | 07456 | 973/862 |
| Shady Lake, NJ | 07480 | 973/862 |
| Singac, NJ | 07424 | 973/862 |
| Skyline Lakes, NJ | 07456 | 973/862 |
| South Paterson, NJ | 07503 | 973/862 |
| South Paterson, NJ | 07533 | 973/862 |
| Totowa, NJ | 07502 | 973/862 |
| Totowa, NJ | 07511 | 973/862 |
| Totowa, NJ | 07512 | 973/862 |
| Totowa Boro, NJ | 07512 | 973/862 |
| Upper Greenwood Lake, NJ | 07421 | 973/862 |
| Wanaque, NJ | 07465 | 973/862 |
| Wayne, NJ | 07470 | 973/862 |
| Wayne, NJ | 07474 | 973/862 |
| West Milford, NJ | 07480 | 973/862 |
| West Milford Lakes, NJ | 07480 | 973/862 |
| West Paterson, NJ | 07424 | 973/862 |
| Woodland Park, NJ | 07424 | 973/862 |