South Holland and The Deepings is a constituency in Lincolnshire represented in the House of Commons of the UK Parliament since its 1997 creation by John Hayes, a Conservative.

South Holland also delivered the second-highest "Leave" vote in the 2016 referendum on the UK's membership of the European Union (EU).

[citation needed] Hayes took 75.9% of the vote, the third highest for the Conservatives only after Castle Point in Essex and Boston and Skegness.

In minor boundary changes that were put in place for the 2010 general election, parts of the two civil parishes of Baston and Langtoft, forming much of the Truesdale ward, were moved to the neighbouring constituency of Grantham and Stamford.

[5] The last non-Conservative member for the predecessor main seat was Sir Herbert Butcher (served 1937–1966) who for much of that time was in the National Liberal Party set up in 1931.