| Business | Phone |
| B B & T 6090 Overseas Hwy, Marathon 33050 | (305) 743-4105 |
| Bank Of America 5401 Overseas Hwy, Marathon 33050 | (305) 743-4121 |
| First State Bank-The Fl Keys 5701 Overseas Hwy, Marathon 33050 | (305) 289-4393 |
| Marine Bank Of The Fl Keys 1638 Overseas Hwy, Marathon 33050 | (305) 289-9828 |
| Marine Bank-The Florida Keys 11290 Overseas Hwy, Marathon 33050 | (305) 743-3030 |
| Marine Bank-The Florida Keys 4594 Overseas Hwy, Marathon 33050 | (305) 743-3344 |
| Marine Bank-The Florida Keys 798 Duck Key Dr, Marathon 33050 | (305) 743-7735 |
| Orion Bank 12640 Overseas Hwy, Marathon 33050 | (305) 743-9444 |
| Orion Bank 5601 Overseas Hwy, Marathon 33050 | (305) 743-0440 |
| Republic Bank 6090 Overseas Hwy, Marathon 33050 | (305) 743-4586 |
| Tib Bank Of The Keys 11401 Overseas Hwy, Marathon 33050 | (305) 743-7845 |
| Tib Bank Of The Keys 2348 Overseas Hwy, Marathon 33050 | (305) 743-0072 |
| Tib Bank Of The Keys 5800 Overseas Hwy, Marathon 33050 | (305) 743-7650 |