This is the flag of British Columbia, which is a banner of the provincial arms. The rendition of the Union Flag, defaced in its centre by a crown, represents the province's origins as a British colony. The wavy white and blue lines symbolize the Pacific Ocean, and the setting sun represents the fact that British Columbia is Canada's westernmost province.

The British Columbia flag was introduced on June 14, 1960 by Premier W. A. C. Bennett, and was first flown on board the BC Ferries vessel Queen of Sidney.