| Hellesøy | |
| Map: | Norway Rogaland |
| Location: | Rogaland, Norway |
| Coordinates: | 58.9825°N 5.8248°W |
| Area Km2: | 0.41 |
| Length M: | 900 |
| Width M: | 700 |
| Coastline Km: | 2.6 |
| Elevation M: | 42 |
| Country: | Norway |
| Country Admin Divisions Title: | County |
| Country Admin Divisions: | Rogaland |
| Country Admin Divisions Title 1: | Municipality |
| Country Admin Divisions 1: | Stavanger |
Hellesøy or Hedlesøy is an island in Stavanger municipality in Rogaland county, Norway. The 0.41km2 island lies in an archipelago at the mouths of the Gandsfjorden and Høgsfjorden, about east of the centre of the city of Stavanger. The island lies close between the islands of Lindøy and Kalvøy and together, the three islands form a "neighborhood" within the city of Stavanger. In 2016, the three islands had a total combined population of 26.[1] The island is only accessible by boat.