Hillside is a residential suburb of the seaside town of Southport, England. It is surrounded by Birkdale, a former town in its own right, but part of Southport itself since amalgamation in 1912. It takes its name from a building named Hill Side, clearly evident on early maps. There was also Hillside Farm, part of which still survives on Hillside Golf Course. The original Birkdale station was in Hillside, situated at the present junction of Dunkirk Road and Dover Road.

Southport is a seaside town in the Metropolitan Borough of Sefton in Merseyside, England. At the 2021 census, it had a population of 94,421, making it the eleventh most populous settlement in North West England.