List of Parliamentary constituencies in Buckinghamshire

  Conservative †   Labour ‡   Liberal Democrat ¤   Independent

Constituency[nb 1]	Electorate[1]	Majority[2][nb 2]	Member of Parliament[2]		Nearest opposition[2]		Map
Aylesbury CC	86,665	17,373		Rob Butler †		Liz Hind ‡
Beaconsfield CC	77,720	15,712		Joy Morrissey †		Dominic Grieve
Buckingham CC	83,146	20,411		Greg Smith †		Stephen Dorrell ¤
Chesham and Amersham CC	72,542	16,223		Cheryl Gillan †		Dan Gallagher ¤
Milton Keynes North CC	91,545	6,255		Ben Everitt †		Charlynne Pullen ‡
Milton Keynes South BC	96,363	6,944		Iain Stewart †		Hannah O'Neill ‡
Wycombe CC	78,093	4,214		Steve Baker †		Khalil Ahmed ‡

In the Fifth Review the Boundary Commission for England[3] proposed changes to realign constituency boundaries with the boundaries of current local government wards, and to reduce the electoral disparity between constituencies. The changes included the return of Great Missenden to Chesham and Amersham, Hazlemere to Wycombe and Aston Clinton to Buckingham. In addition, Marlow was transferred from Wycombe to Beaconsfield and Princes Risborough from Aylesbury to Buckingham. The boundary between the two Milton Keynes constituencies was realigned and they were renamed as Milton Keynes North and Milton Keynes South.

Name	Pre-2010 boundaries	Revised name	Post-2010 boundaries
Aylesbury CC Beaconsfield CC Buckingham CC Chesham and Amersham CC Milton Keynes South West BC Milton Keynes North East CC Wycombe CC	Parliamentary constituencies in Buckinghamshire	Aylesbury CC Beaconsfield CC Buckingham CC Chesham and Amersham CC Milton Keynes North CC Milton Keynes South BC Wycombe CC	Proposed Revised constituencies in Buckinghamshire

The Boundary Commission for England submitted their final proposals in respect of the Sixth Periodic Review of Westminster Constituencies (the 2018 review) in September 2018. Although the proposals were immediately laid before Parliament they were not brought forward by the Government for approval. Accordingly, they did not come into effect for the 2019 election which took place on 12 December 2019, and which was contested using the constituency boundaries in place since 2010.

Under the terms of the Parliamentary Voting System and Constituencies Act 2011, the Sixth Review was based on reducing the total number of MPs from 650 to 600 and a strict electoral parity requirement that the electorate of all constituencies should be within a range of 5% either side of the electoral quota.

On 24 March 2020, the Minister of State for the Cabinet Office, Chloe Smith, issued a written statement to Parliament setting out the Government's thinking with regard to parliamentary boundaries.[4] Subsequently, the Parliamentary Constituencies Act 2020[5] was passed into law on 14 December 2020. This formally removed the duty to implement the 2018 review and set out the framework for future boundary reviews. The Act provided that the number of constituencies should remain at the current level of 650, rather than being reduced to 600, while retaining the requirement that the electorate should be no more than +/- 5% from the electoral quota.

The Act specified that the next review should be completed no later than 1 July 2023 and the Boundary Commission formally launched the 2023 Review on 5 January 2021.[6] See 2023 Periodic Review of Westminster constituencies for further details.

Primary data source: House of Commons research briefing - General election results from 1918 to 2019[7]

2019

The number of votes cast for each political party who fielded candidates in constituencies comprising Buckinghamshire in the 2019 general election were as follows:

Party	Votes	%	Change from 2017	Seats	Change from 2017
Conservative	220,814	52.7%	5.7%	7	1
Labour	106,226	25.4%	3.9%	0	0
Liberal Democrats	57,554	13.7%	7.3%	0	0
Greens	12,349	2.9%	1.1%	0	0
Brexit	1,286	0.3%	new	0	0
Others	20,664	5.0%	8.3%	0	1
Total	418,893	100.0		7

A cell marked → (with a different colour background to the preceding cell) indicates that the previous MP continued to sit under a new party name.

• List of Parliamentary constituencies in the South East (region)
• History of parliamentary constituencies and boundaries in Buckinghamshire