The constituency of Castle Point was created for the 1983 election and has been won once by Labour in the 1997 election by Christine Butler.

The Castle Point Borough Council was created in 1973 with Labour overall control from 1973 – 1976 and again from 1995 – 2003.

Borough Council Wards on Canvey Island

Borough Council Wards in Hadleigh, South Benfleet & Thundersley

County Divisions on Canvey Island

County Divisions covering Hadleigh, South Benfleet & Thundersley