West Lancashire Rural District in the context of Rural sanitary district

The Metropolitan Borough of Sefton is a metropolitan borough of Merseyside, England. It was formed on 1 April 1974, by the amalgamation of the county boroughs of Bootle and Southport, the municipal borough of Crosby, the urban districts of Formby and Litherland, and part of West Lancashire Rural District. It consists of a coastal strip of land on the Irish Sea which extends from Southport in the north to Bootle in the south, and an inland part to Maghull in the south-east, bounded by the city of Liverpool to the south, the Metropolitan Borough of Knowsley to the south-east, and West Lancashire to the east.

It is named after Sefton, near Maghull. When the borough was created, a name was sought that would not unduly identify the borough with any of its constituent parts, particularly the former county boroughs of Bootle and Southport. The area had strong links with both the Earl of Sefton and the Earl of Derby, resident of Knowsley Hall, and the adjacent borough was subsequently named Knowsley. A Sefton Rural District covering some of the villages in the district existed from 1894 to 1932.

The Metropolitan Borough of Knowsley is a metropolitan borough in Merseyside, North West England. It covers several towns and villages, including Kirkby, Prescot, Huyton, Whiston, Halewood, Cronton and Stockbridge Village; Kirkby, Huyton, and Prescot being the major commercial centres. It takes its name from the village of Knowsley, though its headquarters are in Huyton. It forms part of the wider Liverpool City Region.

Within the boundaries of the historic county of Lancashire, the borough was formed on 1 April 1974 by the merger of Huyton-with-Roby Urban District, Kirkby Urban District and Prescot Urban District, along with most of Whiston Rural District and a small part of West Lancashire Rural District, all from the administrative county of Lancashire.