Ringel is a surname. Notable people with the surname include:
Erwin Ringel (1921–1994), Austrian psychiatrist and neurologist who dedicated his life to suicide prevention Faye Ringel, former American professor of humanities at the United States Coast Guard Academy and an author Gerhard Ringel (1919–2008), German mathematician Jean-Désiré Ringel d'Illzach (1849–1916), French sculptor and engraver Julius Ringel (1889–1967), Austrian-born German General of Mountain Troops (General der Gebirgstruppen) Meredith Ringel Morris, an American computer scientist
See also Ringel–Hall algebra, generalization of the Hall algebra, studied by Claus Michael Ringel (1990)