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MacMaster (also Macmaster, McMaster) is a Scottish surname, and may refer to:
People
- Allan MacMaster (born 1974) Canadian politician
- Buddy MacMaster (1924–2014), Canadian musician, uncle of Natalie MacMaster
- Daniel MacMaster (1968–2008), Canadian rock singer
- Sir Donald Macmaster, 1st Baronet (1846–1922), Canadian politician
- Erasmus D. McMaster (1806–1866), American theologian
- Greg MacMaster (born 1962), member of the Michigan House of Representatives
- James McMaster (1820–1886), 19th-century American newspaper editor, changed spelling from MacMaster to appeal to Irish readers
- Ken MacMaster (born 1934), Canadian politician
- Mary Macmaster (born 1955), Scottish musician
- Natalie MacMaster (born 1972), Canadian fiddler
Fictional people
- Alan MacMasters, fictional subject of a Misplaced Pages hoax claiming him to have invented the toaster