Buckmaster is an English surname, and may refer to:

• Adrian Buckmaster, 4th Viscount Buckmaster (born 1949), British businessman
• Charles Buckmaster (1950–1972), Australian poet
• Elliott Buckmaster (1889–1976), American naval officer
• Ernest Buckmaster (1897–1968), Australian artist
• Henrietta Buckmaster (1909–1983), American author
• Herbert J. Buckmaster (1881–1966), English soldier and first husband of actress Gladys Cooper
• Jim Buckmaster (born 1962), American CEO of Craigslist
• John C. Buckmaster (1914–1995), English actor, father of Paul Buckmaster
• John D. Buckmaster (born 1941), American physicist
• John R. Buckmaster (1915–1983), English actor, son of Gladys Cooper
• Luke Buckmaster, Australian film critic, TV critic, author and climate activist
• Martin Stanley Buckmaster, 3rd Viscount Buckmaster (1921–2007), British diplomat
• Maurice Buckmaster (1902–1992), British leader of the French SOE
• Paul Buckmaster (1946–2017), English musician/composer
• Stanley Owen Buckmaster, 1st Viscount Buckmaster (1861–1934), British politician
• Walter Buckmaster (1872–1942), British polo player

• 20084 Buckmaster, main-belt asteroid
• Bristol Buckmaster, RAF advanced training aircraft