William Connolly

William Connolly may refer to:

• William Connolly (VC) (1817–1891), English recipient of the Victoria Cross
• William Connolly (piper) (1839–1870s), Irish piper
• William Harold Connolly (1897–1944), American film director and choreographer
• William M. Connolly (born 1938), justice of the Nebraska Supreme Court
• William E. Connolly (born 1938), Krieger-Eisenhower Professor of Political Science at Johns Hopkins University
• William G. Connolly, co-author of The New York Times style guide and a member of the executive committee of the American Copy Editors Society
• Billy Connolly (born 1942), Scottish comedian