British Columbia is in western Canada.
British Columbia ( BC ) is the westernmost province of Canada , with a population of more than four million people located between the Pacific Ocean and the Rocky Mountains . The largest city is Vancouver , the third-largest metropolitan area in Canada , the largest in Western Canada , and the third-largest in the Pacific Northwest . Western Canada , also referred to as the Western provinces and more commonly known as the West , is a region of Canada that includes the four provinces of Alberta , British Columbia , Manitoba and Saskatchewan .