Mach is a surname. Notable people with the surname include:
Alexander Mach (1902-1980), Slovak politicianBrice Mach (born 1986), French rugby union playerDaniel Mach (born 1955), French politicianDavid Mach (born 1956), Scottish artistEdmund von Mach (1870-1927), German-American writer and lecturer on artErnst Mach (1838-1916), Czech-Austrian physicist and philosopherJosef Mach (1909–1987), Czech actor, screenwriter and film directorPetr Mach (born 1975), Czech politician