History of boundaries From 1885 to 1983,
Louth and
Horncastle both existed as separate constituencies. Then in 1983, Horncastle was moved into the new seat of
Gainsborough and Horncastle, while
Louth was moved into the newly formed
East Lindsey constituency. These boundaries remained the same until 1997, when the current Louth and Horncastle constituency was formed.
1997–2010 The District of East Lindsey wards of Alford, Chapel St Leonards, Coningsby, Donington on Bain, Fotherby, Grimoldby, Halton Holegate, Hogsthorpe, Holton le Clay, Horncastle, Hundleby, Legbourne, Mablethorpe, Mareham le Fen, Marshchapel, New Leake, North Holme, North Somercotes, North Thoresby, Partney, Priory, Roughton, St James', St Margaret's, St Mary's, St Michael's, Spilsby, Sutton and Trusthorpe, Tattershall, Tetford, Tetney, Theddlethorpe St Helen, Trinity, Willoughby with Sloothby, Withern with Stain, and Woodhall Spa.
2010–2024 The District of East Lindsey wards of Alford, Binbrook, Chapel St Leonards, Coningsby and Tattershall, Grimoldby, Halton Holegate, Holton le Clay, Horncastle, Hundleby, Legbourne, Ludford, Mablethorpe Central, Mablethorpe East, Mablethorpe North, Mareham le Fen, Marshchapel, North Holme, North Somercotes, North Thoresby, Priory, Roughton, St James', St Margaret's, St Mary's, St Michael's, Skidbrooke with Saltfleet Haven, Spilsby, Sutton on Sea North, Sutton on Sea South, Tetford, Tetney, Trinity, Trusthorpe and Mablethorpe South, Willoughby with Sloothby, Withern with Stain, and Woodhall Spa.
Current Further to the
2023 review of Westminster constituencies, which came into effect for the
2024 general election, the composition of the constituency is as follows (as they existed on 1 December 2020): • The District of East Lindsey wards of: Alford; Binbrook; Coningsby & Mareham; Fulstow; Grimoldby; Hagworthingham; Halton Holegate; Holton-le-Clay & North Thoresby; Horncastle; Legbourne; Mablethorpe; Marshchapel & Somercotes; North Holme; Priory & St. James’; Roughton; St. Margaret’s; St. Mary’s; St. Michael’s; Spilsby; Sutton on Sea; Tetford & Donington; Tetney; Trinity; Withern & Theddlethorpe; Woodhall Spa; Wragby.
The two wards of Chapel St Leonards and Willoughby with Sloothby were transferred to Boston and Skegness, whilst the previously orphaned ward of Wragby was added from Gainsborough. ==History==