Crosby is a town in the Metropolitan Borough of Sefton, in Merseyside, England. Historically part of Lancashire it is situated north of Bootle, south of Southport, Formby and west of Netherton
The town has Viking roots in common with the other -by suffixed settlements of Formby to the north and Kirkby to the east. Crosby was known as Krossabyr in Old Norse, meaning "village with the cross". The settlement was recorded in the Domesday Book of 1086 as Crosebi, and by the year 1212 had become Crosseby.