The non-metropolitan county of Lincolnshire is divided into 8 parliamentary constituencies – 1 borough constituency and 7 county constituencies.^{[nb 1]}

  † Conservative   ‡ Labour   ¤ Reform UK

Constituency[nb 2]	Electorate[1]	Majority[nb 3]	Member of Parliament[2]		Nearest opposition[2]		Map
Boston and Skegness CC	75,811	2,010		Richard Tice¤		Matt Warman†
Gainsborough CC	75,836	3,532		Sir Edward Leigh†		Jess McGuire‡
Grantham and Bourne CC	73,285	4,496		Gareth Davies†		Vipul Bechar‡
Lincoln BC	72,315	8,793		Hamish Falconer‡		Karl McCartney†
Louth and Horncastle CC	76,880	5,506		Victoria Atkins†		Sean Matthews¤
Rutland and Stamford CC (part)	71,763	10,394		Alicia Kearns†		Joe Wood‡
Sleaford and North Hykeham CC	75,651	4,346		Dr Caroline Johnson†		Hanif Khan‡
South Holland and The Deepings CC	78,473	6,856		John Hayes†		Matthew Swainson¤

For the 2023 Periodic Review of Westminster constituencies, which redrew the constituency map ahead of the 2024 United Kingdom general election, the Boundary Commission for England opted to combine Lincolnshire with Leicestershire and Rutland in a sub-region of the East Midlands region, creating one additional seat by re-establishing the constituency of Rutland and Stamford, spanning all three counties. Consequently, Stamford was removed from the constituency of Grantham and Stamford, which was renamed Grantham and Bourne. ^[3]

Former name	Boundaries 2010–2024	Current name	Boundaries 2024–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		Boston and Skegness CC Gainsborough CC Grantham and Bourne CC Lincoln BC Louth and Horncastle CC Rutland and Stamford CC Sleaford and North Hykeham CC South Holland and The Deepings CC

The following seats were proposed:

Containing electoral wards from Boston

• Boston and Skegness (part)

Containing electoral wards from East Lindsey

• Boston and Skegness (part)
• Louth and Horncastle

Containing electoral wards from Lincoln

• Lincoln (part)

Containing electoral wards from North Kesteven

• Grantham and Bourne (part)
• Lincoln (part)
• Sleaford and North Hykeham

Containing electoral wards from South Holland

• South Holland and The Deepings (part)

Containing electoral wards from South Kesteven

• Grantham and Bourne (part)
• Rutland and Stamford (also comprises the county of Rutland and parts of Harborough in Leicestershire)
• South Holland and The Deepings (part)

Containing electoral wards from West Lyndsey

• Gainsborough

In the Fifth Review the Boundary Commission for England recommended that Lincolnshire retained its current constituencies, with minor changes only to reflect revisions to local authority ward boundaries and to reduce the electoral disparity between constituencies.

Name	Boundaries 1997–2010	Boundaries 2010–2024
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

Primary data source: House of Commons research briefing – General election results from 1918 to 2019^[4]

The number of votes cast for each political party who fielded candidates in constituencies comprising Lincolnshire in the 2024 general election were as follows:^{[nb 4][2]}

Party	Votes	%	Change from 2019	Seats	Change from 2019
Conservative	130,092	35.6%	31.6%	6	1
Labour	94,894	26.0%	5.2%	1	1
Reform	82,464	22.6%	22.3%	1	1
Liberal Democrats	23,808	6.5%	1.2%	0	0
Green	18,204	5.0%	3.1	0	0
Others	15,514	4.3%	2.2%	0	0
Total	364,976	100.0		8

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

¹As the Brexit Party in 2019

²1983 & 1987 – SDP-Liberal Alliance

* Included in Other

¹1983 & 1987 – SDP-Liberal Alliance

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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.

  Conservative   Liberal   Liberal Unionist

  Conservative   Independent   Labour   Liberal   National Liberal (1931–68)

  Conservative   Labour   Lincoln Democratic Labour   National Liberal (1931–68)

  Conservative   Independent   Labour   Reform UK

• 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.