| William J. Woodroffe | |
| Birth Date: | 13 May 1933 |
| Birth Place: | Saint John, New Brunswick |
| Residence: | Saint John, New Brunswick |
| Spouse: | Doreen S. Mills |
| Office1: | Speaker of the Legislative Assembly of New Brunswick |
| Term Start1: | 1973 |
| Term End1: | 1978 |
| Predecessor1: | Lawrence Garvie |
| Successor1: | Robert McCready |
| Office2: | MLA for Saint John-Fundy |
| Term Start2: | 1967 |
| Term End2: | 1978 |
| Successor2: | Bev Harrison |
| Occupation: | Insurance Adjustor |
William J. "Bill" Woodroffe (May 13, 1933 – September 26, 2003) was a political figure in New Brunswick, Canada. He represented Saint John East in the Legislative Assembly of New Brunswick from 1967 to 1978 as a Progressive Conservative member.
He was born in Saint John, New Brunswick, the son of Raymond Henry Woodroffe and Lilia Helen Sewell. In 1957, he married Doreen S. Mills. He had one son and two daughters. He served as a member of the Saint John City Council. Woodroffe was speaker for the provincial assembly from 1973 to 1978, during the Premiership of PC Richard Hatfield.