Edgar Dewdney, PC (5 November 1835 – August 8, 1916) was a Canadian politician born in Devonshire, England. He served as Lieutenant-Governor of one province and one territory.
Dewdney was originally employed as a railway surveyor, and supervised the survey of New Westminster. In 1865 Dewdney was appointed by Lieutenant Governor Frederick Seymour to oversee the construction of a trail to the East Kootenay region of the British Columbia Interior so that coastal merchants might benefit from the burgeoning trade associated with gold mining in that area. Although used for only a few years, parts of the Dewdney Trail, as it was famously known, remain to this day and are used for recreational hiking.
In 1881 Macdonald arranged Dewdney's appointment as Lieutenant-Governor of the North-West [sic] Territories, then an executive position. Dewdney resigned his seat in the Commons, but remained Indian commissioner during his term as Lieutenant-Governor, which lasted until 1888. Responsible government had not been granted to the North-West Territories, so Dewdney was the Territories' head of government. Perhaps his most notable decision in office was changing the territorial capital from Battleford to Regina in 1883 -- a featureless location without water, trees or topography, but where Dewdney had secured substantial real estate for himself adjacent to the Canadian Pacific Railway line.
After his term as Lieutenant-Governor of the Northwest Territories, Dewdney was again elected to Parliament and served as the member for Assiniboia East (now southeastern Saskatchewan) from 1888 to 1891. During this period he also served as minister of the Interior and superintendent of Indian Affairs.
In 1892 he was appointed to the non-executive post of Lieutenant-Governor of British Columbia. He served in this post until 1897.
He retired from politics in 1900 after unsuccessfully running for Parliament in New Westminster, British Columbia.
In 1909 Following the death his wife Jane, Dewdney remarried. His new wife was Blanche Kemeys-Tynte, the daughter of Colonel Charles John Kemeys-Tynte of Halswell, Somerset, England.