| Locality | Post Code |
|---|---|
| Bayway, Union | 07202 |
| Berkeley Heights, Union | 07922 |
| Betsytown, Union | 07201 |
| Chestnut, Union | 07083 |
| Clark, Union | 07066 |
| Cranford, Union | 07016 |
| Elizabeth, Union | 07201, 07202, 07206, 07208 |
| Elizabethport, Union | 07206 |
| Elmora, Union | 07202 |
| Fanwood, Union | 07023 |
| Garwood, Union | 07027 |
| Hillside, Union | 07205 |
| Industrial Hillside, Union | 07205 |
| Kenilworth, Union | 07033 |
| Linden, Union | 07036 |
| Mountainside, Union | 07092 |
| Muhlenberg, Union | 07060 |
| Murray Hill, Union | 07974 |
| New Providence, Union | 07974 |
| North Elizabeth, Union | 07208 |
| Parkandbush, Union | 07202 |
| Peterstown, Union | 07201 |
| Plainfield, Union | 07060, 07062, 07063 |
| Rahway, Union | 07065 |
| Roselle, Union | 07203 |
| Roselle Park, Union | 07204 |