Sir William Edmond Logan, FRSE FRS FGS, was a Canadian-born geologist and the founder and first director of the Geological Survey of Canada.

The Geological Survey of Canada is a Canadian federal government agency responsible for performing geological surveys of the country developing Canada's natural resources and protecting the environment. A branch of the Earth Sciences Sector of Natural Resources Canada, the GSC is the country's oldest scientific agency and was one of its first government organizations.