????–2020[]
On 1 April 2020, Buckinghamshire County Council was abolished and replaced with the Buckinghamshire Council unitary authority, merging the non-metropolitan districts of Aylesbury Vale, Chiltern, South Bucks, and Wycombe.
Local government of Buckinghamshire
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| Unitary Authorities Buckinghamshire Council | Milton Keynes Council Former County, & Borough/District Councils |
County councils of England
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| Cambridgeshire | Derbyshire | Devon | East Sussex | Essex | Gloucestershire | Hampshire | Hertfordshire | Kent | Lancashire | Leicestershire | Lincolnshire | Norfolk | Nottinghamshire | Oxfordshire | Staffordshire | Suffolk | Surrey | Warwickshire | West Sussex | Worcestershire
Former county councils County Councils | Unitary Authorities | Metropolitan Counties/Districts | London | Isles of Scilly |