Michael O'Callaghan (or similar) may refer to:
- Michael O'Callaghan (Paralympian), New Zealand Paralympian who competed in athletics
- Mike O'Callaghan, governor of Nevada
- Mick O'Callaghan, New Zealand rugby union player
- Michael O'Callaghan (politician), see History of Limerick
- Michael O'Callaghan (hurler)
See also
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