Atløy or Atløyna is an island in Askvoll Municipality in Sogn og Fjordane county, Norway. The island lies about west of the mainland coast, just west of the village of Askvoll on the mainland. The island has no road connections to the mainland, but there is a regular ferry route to the mainland. Most of the inhabitants on the island live right along the coast.
The largest population centres on the island are Vilnes on the southwestern coast, Sauesund on the southeastern coast, and Hærland on the northwestern coast. Vilnes Church is a medieval wooden church constructed in 1674, and it is located in the village of Vilnes.