These were all abolished in 1974 under the Local Government Act 1972, to form the new non-metropolitan districts, six in Cornwall. Although districts and boroughs were created and abolished between these periods, as well as undergoing boundary changes after various reviews.[2] This is a list of all the districts and boroughs that existed between these times.[3]
Was in both counties of Cornwall and Devon, but after the single North Tamerton civil parish was transferred to Stratton Rural District in 1934 it fell fully within Devon. The district in Devon was abolished in 1974[4]