Bromborough is a town in the Metropolitan Borough of Wirral, Merseyside, England, and the historic county of Cheshire, on the Wirral Peninsul…Bromborough is a town in the Metropolitan Borough of Wirral, Merseyside, England, and the historic county of Cheshire, on the Wirral Peninsula southeast of Bebington and north of Eastham. At the 2011 census, the population of the ward was 14,850.