The Iron Ring is a symbolic ring worn by Canadian engineers.

Iron R/ring(s) may also refer to: The Iron Ring, a 1997 children's novel by Lloyd Alexander The Iron Ring (film), a 1917 American drama film directed by George Archainbaud Iron Ring (TV series), American mixed martial arts TV series Iron rings, physical training equipment Iron ring (laboratory), scientific laboratory equipment Iron Ring (Wales), a series of fortifications built by Edward I of England

See also Bilbao's Iron Ring, Spanish Civil War fortifications Iron Ring Clock, clock at McMaster University, Canada