| Location: | Troms, Norway |
| Coordinates: | 68.4526°N 16.1638°W |
| Area Km2: | 187 |
| Elevation M: | 1010 |
| Highest Mount: | Trollfjellet |
| Country: | Norway |
| Country Admin Divisions Title: | County |
| Country Admin Divisions: | Troms |
| Country Admin Divisions Title 1: | Municipality |
| Country Admin Divisions 1: | Tjeldsund Municipality |
| Population: | 192[1] |
| Population As Of: | 2016 |
| Density Km2: | 1 |
or [2] is an island in Troms county, Norway. The 187sqkm island is located entirely in Tjeldsund Municipality. North and west of the island lies the Tjeldsundet strait which separates it from the large island of Hinnøya; south of the island is the Ofotfjorden; and east of the island lies the Ramsundet strait which separates it from the mainland of Norway. Tjeldøya is connected to the mainland by the Ramsund Bridge, about south of the village of Hol.