Heswall is a coastal town in the Metropolitan Borough of Wirral in Merseyside, England. It was historically part of Cheshire and becam…Heswall is a coastal town in the Metropolitan Borough of Wirral in Merseyside, England. It was historically part of Cheshire and became part of Merseyside in 1974. It is located on the Wirral Peninsula. At the 2021 census, the population of the built up area as defined by the Office for National Statistics was 29,075.