Dauphin Island Airport (ICAO: K4R9) is a small, publicly owned general aviation airport located on Dauphin Island, a barrier island in Mobile County, Alabama, United States. It serves private pilots and small aircraft rather than commercial airline traffic, providing a convenient air access point to this coastal community. The airport features a single runway and basic facilities suited to light aircraft operations. It is managed locally and primarily supports recreational flying, flight training, and personal travel to the island, which is otherwise accessed by road via a causeway or by ferry.