Inner-Vikna is the largest of the three major islands in Nærøysund Municipality in Trøndelag county, Norway. The 99.2 km2 island is located in the western part of the municipality and it includes the town of Rørvik, the administrative centre of Nærøysund Municipality. Norwegian County Road 770 runs across the island, and also passing by Rørvik Airport, Ryum, then it continues over the Nærøysund Bridge and Marøysund Bridge to connect the island to the mainland. The relatively flat and barren island is separated from the mainland by the Nærøysundet strait.