Mach is a surname. Notable people with the surname include:
Alexander Mach (1902-1980), Slovak politician
Brice Mach (born 1986), French rugby union player
Daniel Mach (born 1955), French politician
David Mach (born 1956), Scottish artist
Edmund von Mach (1870-1927), German-American writer and lecturer on art
Ernst Mach (1838-1916), Czech-Austrian physicist and philosopher
Josef Mach (1909–1987), Czech actor, screenwriter and film director
Petr Mach (born 1975), Czech politician
