| Tumaguin | |
| Map: | Philippines |
| Map Relief: | yes |
| Coordinates: | 11.4564°N 123.2822°W |
| Waterbody: | Visayan Sea |
| Area Km2: | 2.09 |
| Elevation Ft: | 369 |
| Country: | Philippines |
| Country Admin Divisions Title: | Region |
| Country Admin Divisions: | Western Visayas |
| Country Admin Divisions Title 1: | Province |
| Country Admin Divisions 1: | Iloilo |
| Country Admin Divisions Title 2: | Municipality |
| Country Admin Divisions 2: | Carles |
| Country Admin Divisions Title 3: | Barangay |
| Country Admin Divisions 3: | Buaya |
| Population: | uninhabited |
Tumaguin (variously Tamaguin, Tomaquin, or Tumaguin Islet) is a small, uninhabited island in the . Along with nearby Sicogon Island, it is part of Carles, Iloilo.
Tumaguin Island is located 0.25miles due east of Sicogon Island.[1] The island is above sea level.[2] There is a four fathom patch of deep water a little over from the island.[3]
Tumaguin Island is accessible from barangay Buaya in Sicogon by boat, or by foot during low tide.[4]