The Metropolitan Borough of Wirral is a metropolitan borough of Merseyside, in North West England. It has a population of 321,238, and encompasses 60 square miles of the northern part of the Wirral Peninsula. Major settlements include Birkenhead, Wallasey, Bebington, Heswall, Hoylake and West Kirby. The city of Liverpool faces the northeastern side of Wirral over the Mersey.