| Sir William Mack | |
| Order: | 11th |
| Office: | Chief Justice of Queensland |
| Term Start: | 24 February 1966 |
| Term End: | 12 May 1971 |
| Predecessor: | Alan Mansfield |
| Successor: | Mostyn Hanger |
| Governor: | Sir Henry Abel Smith |
| Premier: | Sir Frank Nicklin |
| Birth Date: | 26 November 1904 |
| Birth Place: | Mount Perry, Queensland, Australia |
| Nationality: | Australian |
| Spouse: | Ida Mocatta |
| Father: | Albert George Mack |
| Mother: | Martha |
| Occupation: | Barrister, Judge, Chief Justice |
Sir William George Albert Mack (1904–1979) was a barrister and judge in Queensland, Australia. He was Chief Justice of the Supreme Court of Queensland from 1966 to 1971.[1] He also served as Administrator of Queensland (deputy for the Governor of Queensland) on two occasions.
Mack served as Administrator of Queensland from 10 March 1966 to 21 March 1966 and again on 20 March 1969 to 30 June 1969.[2]