Kummer is a German surname. Notable people with the surname include:
Bernhard Kummer (1897–1962), German GermanistEduard Kummer, also known as the following Ernst KummerErnst Kummer (1810–1893), German mathematicianFriedrich August Kummer (1797–1879), German cellist and composerKarl Kummer (disambiguation), multiple peopleLilian Kummer (born 1975), Swiss skierMario Kummer (born 1962), German cyclistPaul Kummer (1834–1912), priest, taxonomist of ZerbstPatrizia Kummer (born 1987), Swiss snowboarderSiegfried Adolf Kummer (1899–?), mysticistThomas Kummer (born 1963), American classicist and teacherTom Kummer (born 1963), Swiss journalistWolfgang Kummer, German bobsledder