Alberta is a province of Canada. With a population of 3,645,257 in 2011, it is Canada's fourth-most populous province and most populous of Canada's three prairie provinces. Alberta and its neighbour, Saskatchewan, were established as provinces on September 1, 1905.
Alberta is located in western Canada, bounded by the provinces of British Columbia to the west and Saskatchewan to the east, the Northwest Territories to the north, and the U.S. state of Montana to the south. Alberta is one of three Canadian provinces and territories to border only a single U.S. state and is also one of only two provinces that are landlocked.