Canada is divided into ten provinces and three territories. The majority of Canada's population is concentrated in the areas close to the U.S. border. Its four largest provinces by area (Quebec, Ontario, British Columbia and Alberta) are also its most populous; together they account for 86% of the country's population. The territories (the Northwest Territories, Nunavut and Yukon) account for over a third of Canada's area but are home to only 0.3% of its population, which skews the national population density value.