| Offersøya Offersøy | |
| Pushpin Map: | Nordland#Norway |
| Pushpin Label: | Offersøya |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location of the island |
| Location: | Nordland, Norway |
| Coordinates: | 65.8696°N 12.4766°W |
| Area Km2: | 6.7 |
| Length Km: | 6.3 |
| Width Km: | 2 |
| Elevation M: | 43 |
| Country: | Norway |
| Country Admin Divisions Title: | County |
| Country Admin Divisions: | Nordland |
| Country Admin Divisions Title 1: | Municipality |
| Country Admin Divisions 1: | Alstahaug |
| Population: | 61 |
| Population As Of: | 2016 |
Offersøya or Offersøy is an island in Alstahaug Municipality in Nordland county, Norway. The 6.7km2 island lies directly between the large island of Alsta and the smaller island of Tjøtta at the mouth of the Vefsnfjorden. The Norwegian County Road 17 runs across the island connecting Alsta and Tjøtta. The island is relatively flat, with the highest point only reaching above sea level. In 2016, there were 61 residents living on the island.[1]