Kummer is a German surname. Notable people with the surname include:
Bernhard Kummer (1897–1962), German Germanist
Eduard Kummer, also known as the following Ernst Kummer
Ernst Kummer (1810–1893), German mathematician
Friedrich August Kummer (1797–1879), German cellist and composer
Karl Kummer (disambiguation), multiple people
Lilian Kummer (born 1975), Swiss skier
Mario Kummer (born 1962), German cyclist
Paul Kummer (1834–1912), priest, taxonomist of Zerbst
Patrizia Kummer (born 1987), Swiss snowboarder
Siegfried Adolf Kummer (1899–?), mysticist
Thomas Kummer (born 1963), American classicist and teacher
Tom Kummer (born 1963), Swiss journalist
Wolfgang Kummer, German bobsledder
