Thomas, Tom, or Tommy Sheehan or Sheahan may refer to:
- Sheahan
- Tom Sheahan (born 1968), Irish politician
- Sheehan
- Thomas Sheehan (philosopher) (born 1941), American academic who has written on Heidegger and Roman Catholicism
- Tom Sheehan (1894–1982), Major League Baseball pitcher and manager
- Tom Sheehan (politician) (1891–1955), Australian politician
- Tommy Sheehan (baseball) (1877–1959), Major League Baseball third baseman
- Tommy Sheehan (Gaelic footballer) (born 1966), Irish Gaelic footballer
- Tommy Sheehan (Survivor contestant) (born 1992), Survivor: Island of the Idols winner