Cahersiveen (Cathair Saidhbhín in Irish), or Caherciveen is a town in County Kerry, Republic of Ireland. It is located on the Iveragh peninsula on southwest coast of Ireland near Valencia Island. Cahersiveen is connected to the Irish road network by the N70 national secondary route. Cahersiveen has a population of 1272 (CSO 2002).

See also: List of towns in the Republic of Ireland