Buckinghamshire is a ceremonial county in southeast England.
Buckinghamshire may also refer to: Buckinghamshire, a former County of Lower Canada divided in 93 townships in 1792 Buckinghamshire (UK Parliament constituency), a former United Kingdom Parliamentary constituency, 1707–1885 South Buckinghamshire (UK Parliament constituency), a former County constituency and a division of the Administrative County of Buckinghamshire, 1950–1974
See also Buckinghamshire Council, the unitary authority responsible for the centre and south of the English county. City of Milton Keynes, the unitary authority responsible for the north of that county.