Klinker is a surname. Notable people with the surname include:
Eric Klinker, American technology executive Gudrun J. Klinker (born 1958), German computer scientist Lewis William Klinker (1867–1946), American businessman, author, lecturer and public figure Orpha Klinker (1891–1964), American artist Sheila Klinker (born 1938), American politician Umberto Klinker, Surinamese football player