Alberta () is a western province of Canada. With an estimated population of 4,196,457 as of July 1, 2015, it is Canada's fourth-most populous province and the most populous of Canada's three prairie provinces. Alberta and its neighbour Saskatchewan were districts of the Northwest Territories until they were established as provinces on September 1, 1905. The premier has been Rachel Notley since May 2015.
Alberta is bounded by the provinces of British Columbia to the west and Saskatchewan to the east, the Northwest Territories to the north, and the US state of Montana to the south. Alberta is one of three Canadian provinces and territories to border only a single US state and one of only two landlocked provinces. It has a predominantly Humid continental climate, but seasonal temperature average swings are smaller than to areas further east, with winters being warmed by occasional chinook winds bringing sudden warming which moderates average temperatures.
Alberta's capital Edmonton is near the geographic centre of the province and is the primary supply and service hub for Canada's crude oil, oil sands (Athabasca oil sands) and other northern resource industries.