Stockton South was a constituency[n 1] represented in the House of Commons of the UK Parliament from 2019 until its abolition for the 2024 general election by Matt Vickers of the Conservative Party.

[n 2] Under the 2023 periodic review of Westminster constituencies, the seat was abolished; subject to moderate boundary changes, it was reformed as Stockton West.

1997–2010: The Borough of Stockton-on-Tees wards of Bishopsgarth, Egglescliffe, Elm Tree, Fairfield, Grangefield, Hartburn, Ingleby Barwick, Mandale, Parkfield, Preston, Stainsby, Victoria, Village, and Yarm.

Ian Wrigglesworth, the former Labour MP for Thornaby, defected to the newly formed Social Democratic Party in 1981, and held the successor seat as the SDP candidate.

In 2019, the Conservatives took it back, in line with the general swing in their favour in multiple north east red wall seats, despite only being held by Labour for fifteen of its 39 years of existence.