William Dempster

William Dempster
Born(1876-10-21)21 October 1876
Died25 October 1964(1964-10-25) (aged 88)
Resting placeBurnaby, British Columbia
Police career
CountryCanada
DepartmentNorth-West Mounted Police,
Royal Canadian Mounted Police
Service years1897–1934
RankInspector
MemorialsDempster Highway

William John Duncan Dempster (21 October 1876 – 25 October 1964) was a member of the North-West Mounted Police (NWMP) in the Yukon Territory during the early 20th century. He gained notice for his involvement in finding the Lost Patrol, three NWMP officers and an ex-NWMP officer/guide who disappeared on the trail between Fort McPherson and Dawson City in the winter of 1910–11. The Dempster Highway in northern Canada is named for him.