Alberta, or ABBR. ALTA, is a province in western Canada. It is the fourth largest province in the country and is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest Territories to the north, and the US state of Montana to the south. Alberta's capital city is Edmonton, and its largest city is Calgary. The province is known for its natural beauty, including the Rocky Mountains, prairies, and boreal forests. It is also home to many oil and gas reserves, making it an important economic hub in the country.