Klages is a surname. Notable people with the surname include:
Ellen Klages (born 1954), American fiction author Fred Klages (1943–2023), American former professional baseball player Ludwig Klages (1872–1956), German philosopher
See also The Second Awakening of Christa Klages, 1978 film Klages's antwren (Myrmotherula klagesi), species of bird