Duke of Buckingham, referring to Buckingham, is an extinct title that has been created several times in the peerages of England, Great Britain, and the United Kingdom. There were creations of double dukedoms of Buckingham and Normanby and of Buckingham and Chandos. The last holder of the dukedom died in 1889.

Buckingham is a market town in north Buckinghamshire, England, close to the borders of Northamptonshire and Oxfordshire, which had a population of 12,890 at the 2011 Census. The town lies approximately 12 miles (19 km) west of Central Milton Keynes, 19 miles (31 km) south-east of Banbury, and 24 miles (39 km) north-east of Oxford.