McMaster is a surname. Notable people with the surname include:
Andrew Ross McMaster (1876–1937), Canadian politician
A. T. McMaster (1918-2002), American politician
Bill McMaster (born 1930), Australian rules football coach and former player
Bob McMaster (1921–2003), Australian rugby union and rugby league footballer, and wrestler
Carolyn McMaster, Canadian film producer
Cecil McMaster (1900 – unknown), South African Olympic athlete
Drew McMaster (born 1959), retired Scottish sprinter
Elizabeth McMaster (1847–1903), Canadian humanitarian
Fergus McMaster (1879–1950), Australian businessman
Gordon McMaster (1960–1997), Scottish politician
Griffin McMaster (born 1983), Australian football (soccer) player
H. R. McMaster (born 1962), U.S. Army liuetenant general
Harold McMaster (1916–2003), inventor and entrepreneur in the glass industry
Henry McMaster (born 1947), the current Governor of South Carolina
Jamie McMaster (born 1982), English-Australian football (soccer) player
James McMaster 19th-century American Catholic newspaper editor
Joseph McMaster (1861–1929), English cricketer with an extremely short career
Lois McMaster Bujold (born 1949), American author
Luke McMaster (born c. 1970s), American musician of McMaster & James
Que McMaster, former collegiate track and field coach
Rhyll McMaster (born 1947), contemporary Australian poet and novelist
Sam McMaster, the General Manager of the Los Angeles Kings (NHL) from 1994 to 1997
Stanley McMaster (1926–1992), Unionist politician and barrister in Northern Ireland
Susan McMaster (born 1950), Canadian poet, literary editor, and spoken word performer
Valentine Munbee McMaster (1834–1872), Irish war-time surgeon
William McMaster (1811–1887), wholesaler, Senator and banker
William McMaster (businessman) (1851-1930), industrial executive in Quebec
William H. McMaster (1877–1968), the tenth Governor of South Dakota