31 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 07111 | Irvington | 60,334 |
| 07105 | Newark | 56,657 |
| 07104 | Newark | 54,277 |
| 07003 | Bloomfield | 52,921 |
| 07052 | West Orange | 48,323 |
| 07107 | Newark | 42,132 |
| 07017 | East Orange | 40,809 |
| 07109 | Belleville | 37,785 |
| 07103 | Newark | 36,733 |
| 07106 | Newark | 35,999 |
| 07050 | Orange | 33,856 |
| 07039 | Livingston | 31,128 |
| 07110 | Nutley | 29,746 |
| 07108 | Newark | 28,317 |
| 07018 | East Orange | 28,261 |
| 07112 | Newark | 27,633 |
| 07042 | Montclair | 27,173 |
| 07006 | Caldwell | 26,417 |
| 07040 | Maplewood | 25,406 |
| 07079 | South Orange | 18,369 |
| 07044 | Verona | 14,441 |
| 07078 | Short Hills | 14,183 |
| 07043 | Montclair | 13,502 |
| 07009 | Cedar Grove | 13,317 |
| 07102 | Newark | 12,954 |
| 07114 | Newark | 12,658 |
| 07028 | Glen Ridge | 8,002 |
| 07004 | Fairfield | 7,712 |
| 07041 | Millburn | 7,610 |
| 07068 | Roseland | 6,211 |
| 07021 | Essex Fells | 2,320 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 31 ZCTAs in Essex County, New Jersey (US Census).