Rathmullan is a seaside village and townland on the Fanad Peninsula in County Donegal, Ireland. It is situated on the western shore of Lough Swilly, 11 kilometres (7 mi) north-east of Ramelton and 12 km (7 mi) east of Milford. Rathmullan was the point of departure during the Flight of the Earls in 1607, a major turning point in Irish history.

Fanad is a peninsula that lies between Lough Swilly and Mulroy Bay on the north coast of County Donegal, Ireland. The origin of the name Fanad derives from the Irish language word Fána for "sloping ground". It is also referred to as Fannet or Fannett in older records. There are an estimated 700 people living in Fanad and 30% Irish speakers.