Knapdale forms a rural district of Argyll and Bute in the Scottish Highlands, adjoining Kintyre to the south, and divided from the rest of Argyll to the north by the Crinan Canal. It includes two parishes, North Knapdale and South Knapdale. The area is bounded by sea to the east and west, whilst the sea loch of West Loch Tarbert almost completely cuts off the area from Kintyre to the south. The name is derived from two Gaelic elements: Cnap meaning hill and Dall meaning field.

Argyll and Bute is one of 32 unitary council areas in Scotland and a lieutenancy area. The current lord-lieutenant for Argyll and Bute is Jane Margaret MacLeod. The administrative centre for the council area is in Lochgilphead at Kilmory Castle, a 19th-century Gothic Revival building and estate. The current council leader is Robin Currie, a councillor for Kintyre and the Islands.