Cities and Towns in Middlesex County, New Jersey
Founded in 1683, Middlesex County is one of 21 counties in the state of New Jersey. Historically, Middlesex County was one of four original counties created in East Jersey. The city of New Brunswick is the county seat. With FIPS code of 23, Middlesex County has a population of 860,807 and area of 311 square miles (805 km²).
List of all cities in Middlesex County, NJ alphabetically
| City/Town | Postal Code | Area Code |
| Avenel, NJ | 07001 | 732/848 |
| Carteret, NJ | 07008 | 732/848 |
| Colonia, NJ | 07067 | 732/848 |
| Cranbury, NJ | 08512 | 609 |
| Dayton, NJ | 08810 | 732/848 |
| Dunellen, NJ | 08812 | 732/848 |
| East Brunswick, NJ | 08816 | 732/848 |
| East Windsor, NJ | 08512 | 609 |
| Edison, NJ | 08817 | 732/848 |
| 08818 | 732/848 | |
| 08820 | 732/848 | |
| 08837 | 732/848 | |
| 08899 | 732/848 | |
| Fords, NJ | 08863 | 732/848 |
| Green Brook, NJ | 08812 | 732/848 |
| Helmetta, NJ | 08828 | 732/848 |
| Highland Park, NJ | 08904 | 732/848 |
| Hopelawn, NJ | 08861 | 732/848 |
| Iselin, NJ | 08830 | 732/848 |
| Jamesburg, NJ | 08831 | 732/848 |
| Johnson & Johnson, NJ | 08933 | 732/848 |
| Keasbey, NJ | 08832 | 732/848 |
| Kendall Park, NJ | 08824 | 732/848 |
| Kilmer Gmf, NJ | 08906 | 732/848 |
| Laurence Harbor, NJ | 08879 | 732/848 |
| Laurence Hbr, NJ | 08879 | 732/848 |
| Menlo Park, NJ | 08837 | 732/848 |
| Merrill Lynch, NJ | 08988 | 732/848 |
| 08989 | 732/848 | |
| Metuchen, NJ | 08840 | 732/848 |
| Middlesex, NJ | 08846 | 732/848 |
| Milltown, NJ | 08850 | 732/848 |
| Monmouth Junction, NJ | 08852 | 732/848 |
| Monroe, NJ | 08831 | 732/848 |
| Morgan, NJ | 08879 | 732/848 |
| New Brunswick, NJ | 08901 | 732/848 |
| 08902 | 732/848 | |
| 08903 | 732/848 | |
| 08904 | 732/848 | |
| 08905 | 732/848 | |
| 08906 | 732/848 | |
| 08922 | 732/848 | |
| 08933 | 732/848 | |
| 08988 | 732/848 | |
| 08989 | 732/848 | |
| North Brunswick, NJ | 08902 | 732/848 |
| Old Bridge, NJ | 08857 | 732/848 |
| Parlin, NJ | 08859 | 732/848 |
| Perth Amboy, NJ | 08861 | 732/848 |
| 08862 | 732/848 | |
| 08863 | 732/848 | |
| Piscataway, NJ | 08854 | 732/848 |
| 08855 | 732/848 | |
| Plainsboro, NJ | 08536 | 609 |
| Port Reading, NJ | 07064 | 732/848 |
| Prudential Mutual Fund Servi, NJ | 08922 | 732/848 |
| Sayreville, NJ | 08871 | 732/848 |
| 08872 | 732/848 | |
| Sewaren, NJ | 07077 | 732/848 |
| South Amboy, NJ | 08879 | 732/848 |
| South Brunswick, NJ | 08810 | 732/848 |
| South Plainfield, NJ | 07080 | 908 |
| South River, NJ | 08882 | 732/848 |
| Spotswood, NJ | 08884 | 732/848 |
| Wachovia, NJ | 08905 | 732/848 |
| West Carteret, NJ | 07008 | 732/848 |
| Woodbridge, NJ | 07095 | 732/848 |
