Lytham St Annes is a seaside town in the Borough of Fylde in Lancashire, England. It is on the Fylde coast, directly south of Blackpool on the Ribble Estuary. The population of the built-up area at the 2021 census was 42,695. The town is made up of the four areas of Lytham, Ansdell, Fairhaven and St Annes-on-the-Sea.