Delta is a city in the Lower Mainland region of British Columbia, Canada, as part of Greater Vancouver. Located on the Fraser Lowland south of Fraser River's south arm, it is bordered by the city of Richmond on the Lulu Island to the north, New Westminster to the northeast, Surrey to the east, the Boundary Bay and the American pene-exclave Point Roberts to the south, and the Strait of Georgia to the west.

New Westminster is a city in the Lower Mainland region of British Columbia, Canada, and a member municipality of the Metro Vancouver Regional District. It was founded by Major-General Richard Moody as the capital of the Colony of British Columbia in 1858 and continued in that role until the Mainland and Island colonies were merged in 1866. It was the British Columbia Mainland's largest city from that year until it was passed in population by Vancouver during the first decade of the 20th century.