Awaji Island(淡路島,Awaji-shima) is an island in Hyōgo Prefecture, Japan, in the eastern part of the Seto Inland Sea between the islands of Honshū and Shikoku. The island has an area of 592.17 km², and is the largest of the Inland Sea's islands.

As a transit between those two islands, Awaji originally means "the road to Awa", the historic province bordering the Shikoku side of the Naruto Strait, now part of Tokushima Prefecture.