| Official Name: | Sør-Arnøy |
| Other Name: | Sørarnøya / Sørarnøy |
| Settlement Type: | Village |
| Pushpin Map: | Nordland#Norway |
| Pushpin Label Position: | top |
| Subdivision Type: | Country |
| Subdivision Name: | Norway |
| Subdivision Name1: | Northern Norway |
| Subdivision Name2: | Nordland |
| Subdivision Type3: | District |
| Subdivision Name3: | Salten |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Gildeskål Municipality |
| Utc Offset1: | +01:00 |
| Utc Offset1 Dst: | +02:00 |
| Area Total Km2: | 0.66 |
| Population As Of: | 2007 |
| Population Total: | 205 |
| Population Density Km2: | 311 |
| Postal Code Type: | Post Code |
| Postal Code: | 8135 Sørarnøy |
| Coordinates: | 67.1363°N 13.9669°W |
| Elevation M: | 16 |
| Elevation Footnotes: | [1] |
Sør-Arnøy[2] is a small fishing village in Gildeskål Municipality in Nordland county, Norway. The village covers the majority of the island of Sør-Arnøya. The closest town to Sør-Arnøy is Bodø, which is located about to the northeast on the mainland.[3]
The 0.66km2 village had a population (2007) of 205 and a population density of . Since 2007, the population and area data for this village area has not been separately tracked by Statistics Norway.[4]