| Sør-Arnøya | |
| Location: | Nordland, Norway |
| Mapframe-Zoom: | 10 |
| Coordinates: | 67.1363°N 13.9669°W |
| Area Km2: | 4 |
| Length Km: | 3.5 |
| Width Km: | 1.5 |
| Elevation M: | 54 |
| Highest Mount: | Storåsen |
| Country: | Norway |
| Country Admin Divisions Title: | County |
| Country Admin Divisions: | Nordland |
| Country Admin Divisions Title 1: | Municipality |
| Country Admin Divisions 1: | Gildeskål Municipality |
| Population: | 199 |
| Population As Of: | 2016 |
Sør-Arnøya[1] is a small island in Gildeskål Municipality in Nordland county, Norway. The 4km2 island is located west of the neighboring island of Sandhornøya and south of the island of Nord-Arnøya. Sør-Arnøya and Nord-Arnøya are linked with a 100m (300feet) long bridge.
The population (2016) of the island is 199. The main village on the island is the village of Sør-Arnøy. The closest town to Sør-Arnøya is Bodø, to the north, which can be reached by boat.[2]