Kleinfeld is a surname of German origin. The name means "little field" or "small field".
People surnamed Kleinfeld Andrew Kleinfeld (born 1945), American federal judge, husband to Judith Gerald R. Kleinfeld, founder of the German Studies Association Judith Kleinfeld (1944–2025), American professor of psychology and author, wife to Andrew Klaus Kleinfeld (born 1957), German businessman Philip M. Kleinfeld (1894–1971), New York politician and judge
See also Klinefelter