Kemény or Kemeny is a Hungarian surname, and may refer to:
Dénes Kemény (b. 1954), former Hungarian water polo player Emil Kemény (1860–1925), Hungarian-American chess master Ferenc Kemény (1917–2008), also known as Francis Kemeni or Franz Kemeny, Hungarian translator Gábor Kemény (politician, 1910–1946), Hungarian politician who served as Minister of Foreign Affairs, 1944–1945 János Kemény (disambiguation) – several people with the name János Kemény or its anglicization, John Kemeny
Lajos Kemény (b. 1959), Hungarian physician, dermatologist, professor of Medicine Rudolf Kemény (1871–1945), Hungarian violinist and violin teacher Zoltán Kemény (1907–1965), Hungarian sculptor Zsigmond Kemény (1814–1875), Hungarian author The Kemeny method, named after John G. Kemeny (1926-1992)
Kemény (Kemen, Kemyn, Kemynus) was also a former given name in medieval Hungary. Notable people with the given name include: Kemény, son of Lawrence, 13th-century Hungarian lord
See also List of titled noble families in the Kingdom of Hungary