Cities and Towns in Union County, New Jersey
Founded in 1857, Union County is one of 21 counties in the state of New Jersey. Historically, Union County was formed from Essex County. The city of Elizabeth is the county seat. With FIPS code of 39, Union County has a population of 572,114 and area of 103 square miles (267 km²).
List of all cities in Union County, NJ alphabetically
| City/Town | Postal Code | Area Code |
| Bayway, NJ | 07202 | 908 |
| Berkeley Heights, NJ | 07922 | 908 |
| Betsytown, NJ | 07201 | 908 |
| Chestnut, NJ | 07083 | 908 |
| Clark, NJ | 07066 | 908 |
| Cranford, NJ | 07016 | 908 |
| Elizabeth, NJ | 07201 | 908 |
| 07202 | 908 | |
| 07206 | 908 | |
| 07207 | 908 | |
| 07208 | 908 | |
| Elizabethport, NJ | 07206 | 908 |
| Elmora, NJ | 07202 | 908 |
| Fanwood, NJ | 07023 | 908 |
| Garwood, NJ | 07027 | 908 |
| Hillside, NJ | 07205 | 908 |
| Ind Hillside, NJ | 07205 | 908 |
| Industrial Hillside, NJ | 07205 | 908 |
| Kenilworth, NJ | 07033 | 908 |
| Linden, NJ | 07036 | 908 |
| Mountainside, NJ | 07092 | 908 |
| Muhlenberg, NJ | 07060 | 908 |
| Murray Hill, NJ | 07974 | 908 |
| New Providence, NJ | 07974 | 908 |
| North Elizabeth, NJ | 07208 | 908 |
| North Plainfield, NJ | 07060 | 908 |
| 07062 | 908 | |
| 07063 | 908 | |
| Parkandbush, NJ | 07202 | 908 |
| Peterstown, NJ | 07201 | 908 |
| Plainfield, NJ | 07060 | 908 |
| 07061 | 908 | |
| 07062 | 908 | |
| 07063 | 908 | |
| Rahway, NJ | 07065 | 732/848 |
| Roselle, NJ | 07203 | 908 |
| Roselle Park, NJ | 07204 | 908 |
| Scotch Plns, NJ | 07076 | 908 |
| Springfield, NJ | 07081 | 973/862 |
| Summit, NJ | 07901 | 908 |
| 07902 | 908 | |
| Townley, NJ | 07083 | 908 |
| Tremley, NJ | 07036 | 908 |
| Tremley Point, NJ | 07036 | 908 |
| Union, NJ | 07083 | 908 |
| Union Center, NJ | 07083 | 908 |
| Union Square, NJ | 07201 | 908 |
| Vauxhall, NJ | 07088 | 908 |
| Westfield, NJ | 07090 | 908 |
| 07091 | 908 | |
| Winfield Park, NJ | 07036 | 908 |
