9 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 33040 | Key West | 36,379 |
| 33037 | Key Largo | 13,265 |
| 33050 | Marathon | 10,520 |
| 33042 | Summerland Key | 6,990 |
| 33070 | Tavernier | 5,717 |
| 33043 | Big Pine Key | 4,547 |
| 33036 | Islamorada | 3,620 |
| 33051 | Key Colony Beach | 650 |
| 33001 | Long Key | 340 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 9 ZCTAs in Monroe County, Florida (US Census).