Buckinghamshire200px|Placering af Buckinghamshire i EnglandGeografiStatus:CeremonieltRegion:South East EnglandAreal:1.874 km² ceremonieltAdministrationsby:AylesburyISO 3166-2:GB-BKMDemografiBefolkning: (2018)Tæthed:808.666 Distrikter150px|Inddeling af Buckinghamshire Buckinghamshire (Unitary) Milton Keynes (Unitary)
Buckinghamshire er et grevskab i England. Administrationsbyen (county town) er Aylesbury.
Buckinghamshire grænser op til Oxfordshire, Northamptonshire, Bedfordshire, Hertfordshire, Berkshire og Greater London. Som følge af reformen i 1974 mistede Buckinghamshire Slough og Eton til Berkshire, mens Milton Keynes (borough og district) (over 250.000 indbyggere (2020) og 309 km²) blev et unitary authority i 1997. De øvrige districts (kommuner) blev sammenlagt til Buckinghamshire (cirka 560.000 indbyggere (2020) og 1.565 km²) under kommunalbestyrelsen Buckinghamshire Council (unitary authority) den 1. april 2020. Buckinghamshire County består således fra 1. april 2020 af to unitary authorities og er selv kun et historisk ceremonial county uden et amtsråd (Buckinghamshire County Council).
Byer og Stednavne Amersham Aylesbury Beaconsfield Buckingham Chesham Farnham Royal Great Missenden High Wycombe Marlow Princes Risborough Wendover Winslow
Andre byer/stednavne i Buckinghamshire inden reformen: Bletchley Eton Fenny Stratford Milton Keynes Newport Pagnell Olney Slough Stony Stratford Wolverton
Seværdigheder
The Abbey, Aston Abbotts Amersham Museum Ascott Ashridge Estate Bekonscot Bernwood Forest Black Park Bletchley Park Blue Lagoon Local Nature Reserve Boarstall Duck Decoy Boarstall Tower Bradenham Village Bradwell Abbey Brill Windmill Buckingham Chantry Chapel Buckinghamshire County Museum Buckinghamshire Railway Centre in Quainton Bulstrode Park Chequers Court Chesham Museum Chicheley Hall Chiltern Open Air Museum Chiltern scarp Chinnor & Princes Risborough Railway Claydon House Cliveden Concrete Cows Coombe Hill The Cowper and Newton Museum Dorney Lake Dorneywood Emberton Country Park Eton College Eythrope Halton House Hampden House Hartwell House Hospital of St John the Baptist Hughenden Manor Ivinghoe Beacon Kederminster Library The King's Head Inn, Aylesbury Linford Manor Little Britain Long Crendon Courthouse Mentmore Towers Milton Keynes Museum Milton Keynes Peace Pagoda Pitstone Windmill Princes Risborough Manor House Roald Dahl Children's Gallery Roald Dahl Museum and Story Centre Shardeloes Snelshall Priory Stowe Park Waddesdon Manor West Wycombe Caves West Wycombe Park West Wycombe Village Whiteleaf Cross Winslow Hall Wycombe Abbey