| Mapframe-Zoom: | 9 |
| Location: | Nordland, Norway |
| Coordinates: | 68.0022°N 15.4969°W |
| Area Km2: | 68 |
| Elevation M: | 436 |
| Highest Mount: | Straumfjellet |
| Country: | Norway |
| Country Admin Divisions Title: | County |
| Country Admin Divisions: | Nordland |
| Country Admin Divisions Title 1: | Municipality |
| Country Admin Divisions 1: | Hamarøy Municipality |
| Population: | 75 |
| Population As Of: | 2016 |
or [1] is an island in Hamarøy Municipality in Nordland county, Norway. The island is situated northwest of the village of Innhavet with which it is connected by bridge. The mountainous island has an area of and the highest point is the 436m (1,430feet) tall mountain Straumfjellet.[2] In 2016, the island of Finnøya had a population of 75.[3]
Sagfjord Church is located on the south side of the island in the village of Karlsøy.