| St. Johns National Wildlife Refuge | |
| Iucn Category: | V |
| Map: | Florida#USA |
| Relief: | 1 |
| Location: | Brevard County, Florida, United States |
| Nearest City: | Titusville, Florida |
| Coordinates: | 28.5583°N -80.8875°W |
| Area: | 6,255 acres (25 km2) |
| Established: | 1971 |
| Governing Body: | US Fish & Wildlife Service |
| Website: | St. Johns National Wildlife Refuge |
The St. Johns National Wildlife Refuge is part of the United States National Wildlife Refuge System, located off SR 50 just west of Titusville. The 6,255 acre (25 km2) refuge was established in 1971 to protect the now extinct dusky seaside sparrow, Ammodramus maritimus nigrescens. It is administered as part of Merritt Island National Wildlife Refuge.