John Riordan

John Riordan is the name of:

• John R. Riordan (* 1943), Canadian biochemist
• John Riordan (banker) , American banker
• John Riordan (mathematician) (1903–1988), American mathematician
• John Riordan (poker player) , American poker player

This is a disambiguation page for differentiating between several terms identified with the same word.