Deringer is a German surname. It originates from either a personal name or toponym. Notable people with the surname include:
Arved Deringer (1913–2011), German lawyer and politician Henry Deringer (1786–1868), American gunsmith, the son of Henry Deringer Sr. Henry Deringer Sr. (1756–1833), American gunsmith, the father and mentor of Henry Deringer Jr.
See also Derringer (surname)