| Ajax Reef | |
| Location: | Caribbean |
| Pushpin Map: | Florida#Caribbean |
| Country: | United States |
| Type: | reef |
Ajax Reef is a natural coral reef located within the Florida Keys National Marine Sanctuary and also within Biscayne National Park. Unlike many reefs within the National Marine Sanctuary, this reef is not within a Sanctuary Preservation Area (SPA). It is north of Pacific Reef.
