West Dorset was a local government district in Dorset, England. The district was formed on 1 April 1974 under the Local Government Act 1972, and was a merger of the boroughs of Bridport, Dorchester and Lyme Regis, along with Sherborne urban district and the rural districts of Beaminster, Bridport, Dorchester and Sherborne. Its council was based in Dorchester.

Dorset is a unitary authority area, existing since 1 April 2019, in the ceremonial county of Dorset, England. It covers all of the ceremonial county except for Bournemouth, Christchurch and Poole. The council of the district is Dorset Council, which is in effect Dorset County Council re-constituted so as to be vested with the powers and duties of five district councils which were abolished, and shedding its partial responsibility for and powers in Christchurch.