Callahan may refer to:
- Callahan (surname)
- Father Callahan, in Stephen King novels
- Harry Callahan (character), in Dirty Harry movies
- Jack Callahan (Neighbours), from the Australian soap opera Neighbours
- Mike Callahan, of Callahan's Crosstime Saloon in the novel series
- Nancy Callahan, from the Sin City graphic novel series
- Peggy Callahan in the TV series The Bionic Woman
- Professor Callahan, in the movie Legally Blonde
- Thomas R. "Tommy" Callahan III in film Tommy Boy
- Veronica Callahan in Mercy (TV series)
|This disambiguation page lists articles associated with the title Callahan.
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