| Honorific-Prefix: | The Honourable |
| Sir William Haworth | |
| Constituency Mp: | Isaacs |
| Parliament: | Australian |
| Predecessor: | New seat |
| Successor: | Division abolished |
| Term Start: | 10 December 1949 |
| Term End: | 29 September 1969 |
| Birth Date: | 1905 4, df=yes |
| Birth Place: | Hawthorn, Victoria, Australia |
| Death Place: | Melbourne, Victoria, Australia |
| Nationality: | Australian |
| Party: | Liberal Party of Australia |
| Alma Mater: | University of Melbourne |
| Occupation: | Pharmaceutical chemist |
Sir William Crawford Haworth (15 April 1905 – 1 December 1984) was an Australian politician. Born in Melbourne, he was educated at state schools before attending the University of Melbourne and the Victorian College of Pharmacy. He became a pharmaceutical chemist, and served in the military 1940–44. In 1937, he was elected to the Victorian Legislative Assembly as the United Australia Party member for Albert Park; he was the Victorian Minister for Health and Housing in 1945. He was defeated in 1945,[1] but in 1949 was elected to the Australian House of Representatives as the Liberal member for the new seat of Isaacs. He held the seat until his retirement in 1969, when he received a knighthood. Haworth died in 1984.[2]