| St. Nicholas III | |
| Location: | Tarpon Springs, Florida |
| Coordinates: | 28.1553°N -82.7619°W |
| Refnum: | 90001136 |
| Added: | August 3, 1990 |
| Mpsub: | Tarpon Springs Sponge Boats MPS |
The St. Nicholas III is a historic boat in Tarpon Springs, Florida. It is located at the Tarpon Springs Sponge Docks at Dodecanese Boulevard. On August 3, 1990, it was added to the U.S. National Register of Historic Places.