John Palliser was an Irish-born geographer and explorer. Following his service in the Waterford Militia and hunting excursions to the North American prairies, he led the British North American Exploring Expedition which investigated the geography, climate and ecology of what would later become western Canada.

The Palliser expedition, officially the British North American Exploring Expedition, explored and surveyed the open prairies and rugged wilderness of western Canada from 1857 to 1860. The expedition was led by Irish-born explorer John Palliser, and accompanied by a party of four other men: James Hector, Eugène Bourgeau, Thomas Blakiston and John W. Sullivan. With the support of the British government and the Royal Geographical Society it became an official expedition with the stated purpose of gathering scientific information about the landscapes of British-claimed north-western North America, in particular the territory of Rupert's Land, including information on the geography, climate, soil, flora and fauna, in order to discover its capabilities for settlement and transportation.