List of Parliamentary constituencies in Lincolnshire

  † Conservative   ‡ Labour

Constituency[nb 1]	Electorate[1]	Majority[2][nb 2]	Member of Parliament[2]		Nearest opposition[2]		Map
Boston and Skegness CC	69,381	25,621		Matt Warman†		Ben Cook‡
Gainsborough CC	76,343	22,967		Sir Edward Leigh†		Perry Smith‡
Grantham and Stamford CC	81,502	26,003		Gareth Davies†		Kathryn Salt‡
Lincoln BC	74,942	3,514		Karl McCartney†		Karen Lee‡
Louth and Horncastle CC	79,634	28,868		Victoria Atkins†		Ellie Green‡
Sleaford and North Hykeham CC	94,761	32,564		Dr Caroline Johnson†		Linda Edwards-Shea‡
South Holland and The Deepings CC	75,975	30,838		John Hayes†		Mark Popple‡

Proposals by the Boundary Commission for England retained these 7 constituencies, with changes to realign constituency boundaries with the boundaries of current local government wards, and to reduce the electoral disparity between constituencies. These changes took effect at the 2010 United Kingdom general election.

Name	Boundaries 1997-2010	Boundaries 2010-present
Boston and Skegness CC Gainsborough CC Grantham and Stamford CC Lincoln BC Louth and Horncastle CC Sleaford and North Hykeham CC South Holland and The Deepings CC	Parliamentary constituencies in Lincolnshire	Proposed Revision

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 Lincolnshire in the 2019 general election were as follows:

Party	Votes	%	Change from 2017	Seats	Change from 2017
Conservative	246,959	67.2%	5.6%	7	1
Labour	76,583	20.8%	7.7%	0	1
Liberal Democrats	28,389	7.7%	3.6%	0	0
Greens	6,815	1.9%	0.5%	0	0
Brexit	1,079	0.3%	new	0	0
Others	7,614	2.1%	2.3%	0	0
Total	367,439	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 East Midlands (region)
• List of Parliamentary constituencies in Humberside for those covering North Lincolnshire and North East Lincolnshire unitary authorities.