Sefton is a village and civil parish in the Metropolitan Borough of Sefton in Merseyside, England. It is located to the south west of Maghull and to the north east of Great Crosby. It is on the flood plain of the River Alt. The village is bisected by the B5422, Brickwall Lane. At the 2001 Census the population was recorded as 772. This increased to 855 at the 2011 Census.