Arago is an unincorporated community in Coos County, Oregon, on the Coquille River, about six miles south of Coquille. The area's elevation is 30 feet (9 m). Firefighting services are provided by the Coquille Rural Fire District and law enforcement services by the Coos County Sheriff and Myrtle Point police.
The Arago post office was named for Cape Arago, which in turn was named for French physicist and geographer François Arago. The previously suggested name of Halls Prairie was disapproved by postal authorities.
Coordinates: 43°06′07″N 124°11′32″W / 43.10194°N 124.19222°W / 43.10194; -124.19222