List of Parliamentary constituencies in Essex

  Conservative†   Labour‡   Liberal Democrat¤

Constituency[nb 1]	Electorate[1]	Majority[2][nb 2]	Majority (percentage)	Member of Parliament[2]		Nearest opposition[2]		Map
Basildon and Billericay BC	69,906	20,412	46.3%		John Baron †		Andrew Gorgon ‡
Braintree CC	75,208	24,673	49.1%		James Cleverly †		Joshua Garfield ‡
Brentwood and Ongar CC	75,255	29,065	54.9%		Alex Burghart †		Oliver Durose ‡
Castle Point BC	69,608	26,634	60.1%		Rebecca Harris †		Katie Curtis ‡
Chelmsford BC	80,394	17,621	30.8%		Vicky Ford †		Marie Goldman ¤
Clacton CC	70,930	24,702	56.8%		Giles Watling †		Kevin Bonavia‡
Colchester BC	82,625	9,423	17.6%		Will Quince †		Tina McKay ‡
Epping Forest CC	74,304	22,173	44.1%		Eleanor Laing †		Vicky Ashworth Te Velde ‡
Harlow CC	68,078	14,063	32.5%		Robert Halfon †		Laura McAlpine ‡
Harwich and North Essex CC	74,153	20,182	38.9%		Bernard Jenkin †		Stephen Rice ‡
Maldon CC	72,438	30,041	59.6%		John Whittingdale †		Stephen Capper ‡
Rayleigh and Wickford CC	78,930	31,000	56.5%		Mark Francois †		David Flack ‡
Rochford and Southend East CC	75,624	12,286	26.7%		James Duddridge †		Ashley Dalton ‡
Saffron Walden CC	87,017	27,594	43.8%		Kemi Badenoch †		Mike Hibbs ¤
South Basildon and East Thurrock CC	74,441	19,922	44.0%		Stephen Metcalfe †		Jack Ferguson ‡
Southend West BC	69,043	14,459	31.1%		David Amess †		Aston Line ‡
Thurrock BC	79,659	11,482	24.4%		Jackie Doyle-Price †		John Kent ‡
Witham CC	70,402	24,082	48.8%		Priti Patel †		Martin Edobor ‡

Under the Fifth Periodic Review of Westminster constituencies, the Boundary Commission for England increased Essex's representation from 17 to 18 MPs, with the creation of the constituency of Witham. This had a significant impact on the boundaries of the majority of the existing constituencies and also resulted in several name changes.

Constituency name	Boundaries 1997-2010	Constituency name	Boundaries 2010-present
Basildon BC Billericay CC Braintree CC Brentwood and Ongar CC Castle Point BC Colchester BC Epping Forest CC Harlow CC Harwich CC Maldon and East Chelmsford CC North Essex CC Rayleigh CC Rochford and Southend East CC Saffron Walden CC Southend West BC Thurrock BC West Chelmsford CC		Basildon and Billericay BC Braintree CC Brentwood and Ongar CC Castle Point BC Chelmsford BC Clacton CC Colchester BC Epping Forest CC Harlow CC Harwich and North Essex CC Maldon CC Rayleigh and Wickford CC Rochford and Southend East CC Saffron Walden CC South Basildon and East Thurrock CC Southend West BC Thurrock BC Witham CC

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.[3] Subsequently, the Parliamentary Constituencies Act 2020[4] 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.[5] 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[6]

2019

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

Party	Votes	%	Change from 2017	Seats	Change from 2017
Conservative	577,118	64.5%	6.0%	18	0
Labour	189,471	21.2%	7.8%	0	0
Liberal Democrats	95,078	10.6%	4.8%	0	0
Greens	20,438	2.3%	0.8%	0	0
Others	12,502	1.4%	3.8%	0	0
Total	894,607	100.0		18

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.

Key: bulk or all of areas marked † form part of present-day Greater London.

• List of Parliamentary constituencies in the East of England (region)
• History of Parliamentary constituencies and boundaries in Essex
• Historical List of Parliamentary constituencies in Essex
• List of former parliamentary constituencies in Essex