| Altra | |
| Location: | Nordland, Norway |
| Mapframe-Zoom: | 9 |
| Coordinates: | 65.9271°N 12.3425°W |
| Area Km2: | 0.24 |
| Length Km: | 12 |
| Width Km: | 2 |
| Country: | Norway |
| Country Admin Divisions Title: | County |
| Country Admin Divisions: | Nordland |
| Country Admin Divisions Title 1: | Municipality |
| Country Admin Divisions 1: | Alstahaug Municipality |
| Population: | 76 |
| Population As Of: | 2016 |
Altra[1] is an island in Alstahaug Municipality in Nordland county, Norway. The 0.24km2 island lies between the large island of Alsta and the small island of Tenna (in Herøy Municipality). The flat island is rather unusual in the area because it is about long and at most about 2km (01miles) wide at the northern end. Most of the island is very narrow, and in some places, it is only about wide.[2]
There are a few small villages on the island: Austbø in the north, Korsvegen and Blomsøya in the middle, and Hestøya in the south. The island has a regular ferry connection to the neighboring islands of Alsta and Sør-Herøy. In 2016, there were 76 residents living on the island.