Founded in 1823, Monroe County is one of 67 counties in the state of Florida. Historically, Monroe County was formed from St. Johns. The city of Key West is the county seat. With FIPS code of 87, Monroe County has a population of 82,170 and area of 997 square miles (2,582 km2).
List of all cities in Monroe County, FL alphabetically
| City/Town | Postal Code | Area Code |
| Big Pine Key, FL | 33043 | 305/786 |
| Big Torch Key, FL | 33042 | 305/786 |
| Conch Key, FL | 33001 | 305/786 |
| 33050 | 305/786 | |
| Cross Key, FL | 33037 | 305/786 |
| Cudjoe Key, FL | 33042 | 305/786 |
| Duck Key, FL | 33050 | 305/786 |
| East Rockland Key, FL | 33040 | 305/786 |
| Fiesta Key, FL | 33001 | 305/786 |
| Fort Jefferson National Mon, FL | 33040 | 305/786 |
| Grassy Key, FL | 33050 | 305/786 |
| Islamorada, FL | 33036 | 305/786 |
| 33070 | 305/786 | |
| Key Colony Beach, FL | 33051 | 305/786 |
| Key Largo, FL | 33037 | 305/786 |
| Key West, FL | 33040 | 305/786 |
| 33041 | 305/786 | |
| 33045 | 305/786 | |
| Key West Naval Air Station, FL | 33040 | 305/786 |
| Layton, FL | 33001 | 305/786 |
| Little Torch Key, FL | 33042 | 305/786 |
| Long Key, FL | 33001 | 305/786 |
| Lower Matecumbe Key, FL | 33036 | 305/786 |
| Lower Sugarloaf Key, FL | 33042 | 305/786 |
| Marathon, FL | 33050 | 305/786 |
| 33051 | 305/786 | |
| 33052 | 305/786 | |
| Marathon Shores, FL | 33050 | 305/786 |
| 33052 | 305/786 | |
| Matecumbe Key, FL | 33036 | 305/786 |
| Middle Torch Key, FL | 33042 | 305/786 |
| Munson Island, FL | 33040 | 305/786 |
| Naval Air Station Unit 2, FL | 33040 | 305/786 |
| No Name Key, FL | 33043 | 305/786 |
| Ocean Reef Club, FL | 33037 | 305/786 |
| Plantation Key, FL | 33036 | 305/786 |
| 33070 | 305/786 | |
| Raccoon Key, FL | 33040 | 305/786 |
| Ramrod Key, FL | 33042 | 305/786 |
| Stock Island, FL | 33040 | 305/786 |
| 33041 | 305/786 | |
| Sugarloaf, FL | 33042 | 305/786 |
| Sugarloaf Key, FL | 33042 | 305/786 |
| Sugarloaf Shrs, FL | 33042 | 305/786 |
| Summerland Key, FL | 33042 | 305/786 |
| 33043 | 305/786 | |
| Tavernier, FL | 33070 | 305/786 |
| Upper Key Largo, FL | 33037 | 305/786 |
| Upper Matecumbe Key, FL | 33036 | 305/786 |
| Upper Sugarloaf Key, FL | 33042 | 305/786 |
| Upr Sugarloaf, FL | 33042 | 305/786 |
| Venetian Shores, FL | 33036 | 305/786 |
| Windley Key, FL | 33036 | 305/786 |
Map of Cities in Monroe County, FL
