Southall formed part of the chapelry of Norwood in the ancient parish of Hayes, in the Elthorne hundred of the historic county of Middlesex. For Poor Law it was grouped into the Uxbridge Union and was within Uxbridge Rural Sanitary District from 1875. The chapelry of Norwood had functioned as a separate parish since the Middle Ages. On 16 January 1891 the parish adopted the Local Government Act 1858 and the Southall Norwood Local Government District was formed. In 1894 it became the Southall Norwood Urban District. In 1936 the urban district was granted a charter of incorporation and became a municipal borough, renamed Southall. In 1965 the former area of the borough was merged with that of the boroughs of Ealing and Acton to form the London Borough of Ealing in Greater London.