31 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 07111 | Irvington | 60,867 |
| 07105 | Newark | 57,093 |
| 07003 | Bloomfield | 53,771 |
| 07104 | Newark | 52,266 |
| 07052 | West Orange | 48,620 |
| 07107 | Newark | 43,293 |
| 07017 | East Orange | 40,910 |
| 07109 | Belleville | 37,984 |
| 07103 | Newark | 37,293 |
| 07106 | Newark | 36,383 |
| 07050 | Orange | 34,181 |
| 07039 | Livingston | 31,488 |
| 07110 | Nutley | 29,980 |
| 07112 | Newark | 29,456 |
| 07018 | East Orange | 28,924 |
| 07108 | Newark | 28,790 |
| 07042 | Montclair | 27,326 |
| 07006 | Caldwell | 26,654 |
| 07040 | Maplewood | 25,613 |
| 07079 | South Orange | 18,539 |
| 07078 | Short Hills | 14,613 |
| 07044 | Verona | 14,545 |
| 07114 | Newark | 13,670 |
| 07009 | Cedar Grove | 13,535 |
| 07043 | Montclair | 13,256 |
| 07102 | Newark | 12,358 |
| 07028 | Glen Ridge | 8,022 |
| 07004 | Fairfield | 7,824 |
| 07041 | Millburn | 7,532 |
| 07068 | Roseland | 6,268 |
| 07021 | Essex Fells | 2,361 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 31 ZCTAs in Essex County, New Jersey (US Census).