William Callahan

William Callahan may refer to:

William F. Callahan (1891–1964), chairman of the Massachusetts Turnpike Authority
- William F. Callahan Tunnel, a Boston Harbor tunnel
William P. Callahan (born 1950), an American Roman Catholic bishop
William R. Callahan (state representative) (1925–1976), a Massachusetts state representative
William R. Callahan (priest) (1931–2010), an American Roman Catholic priest

Bill Callahan may refer to:

Bill Callahan (American football), American football coach
Bill Callahan (musician), American singer-songwriter
Bill Callahan (producer), former producer and writer for Scrubs

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