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
 
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