| Ytter-Vikna | |
| Mapframe-Zoom: | 8 |
| Location: | Trøndelag, Norway |
| Coordinates: | 64.9113°N 10.8821°W |
| Area Km2: | 82 |
| Length Km: | 25 |
| Width Km: | 7 |
| Elevation M: | 173 |
| Highest Mount: | Vattafjellet |
| Country: | Norway |
| Country Admin Divisions Title: | County |
| Country Admin Divisions: | Trøndelag |
| Country Admin Divisions Title 1: | Municipality |
| Country Admin Divisions 1: | Nærøysund Municipality |
Ytter-Vikna[1] is one of the three major islands in Nærøysund Municipality in Trøndelag county, Norway. It is located in the western part of the municipality. Norwegian County Road 770 crosses the 82km2 island. The villages of Austafjord and Valøya are located on this island.[2]