Southport is a seaside town in the Metropolitan Borough of Sefton in Merseyside, England. It lies on the West Lancashire coastal plain and the east coast of the Irish Sea, approximately 17 miles north of Liverpool and 15 miles southwest of Preston. At the 2021 census, Southport had a population of 94,421, making it the eleventh most populous settlement in North West England and the third most populous settlement in the Liverpool City Region.