Sheahan may refer to:
- Bill Sheahan (umpire) (born 1953), Australian Test cricket match umpire
- Bill Sheahan (politician) (1895–1975), Australian politician
- Frankie Sheahan (born 1976), rugby player
- John Sheahan (born 1939), Irish violinist and folk musician
- Maurie Sheahan (1905–1956), Australian rules footballer
- Mike Sheahan (born 1945), Australian journalist
- Paul Sheahan (born 1946), Australian Test cricketer
- Tom Sheahan (born 1968), Irish Fine Gael politician
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