William MacGregor (1846–1919) was a Lieutenant-Governor of British New Guinea, Governor of Newfoundland and Governor of Queensland.
William or Bill(y) MacGregor may also refer to:
Sir William Macgregor, 2nd Baronet (1817–1846), British Army officer William MacGregor (Australian politician) (1853–1899), New South Wales politician William York Macgregor (1855–1923), Scottish landscape painter William MacGregor (judge) (1862–1934), New Zealand King's Counsel William Firth MacGregor (1896–?), painter, illustrator and artist William Macgregor (cricketer) (1888–1980), Australian cricketer and veterinarian Bill MacGregor (politician), American politician and member of the Massachusetts House of Representatives
Characters Bill MacGregor, character on Second Thoughts Billy MacGregor, character in Head of the Class and Billy
Musicians Will MacGregor, musician in Fear Bill MacGregor, musician in High Holy Days
See also William McGregor (disambiguation) William Gregor (1761–1817), British clergyman and mineralogist