Paisley and Renfrewshire South (UK Parliament constituency)

Paisley and Renfrewshire South  is a constituency of the House of Commons, located in Renfrewshire, Scotland to the southwest of Glasgow. It elects one member of Parliament at least once every five years using the first-past-the-post system of voting.

Boundaries
This seat was created in 2005 from the bulk of the former Paisley South seat, with minor additions from neighbouring constituencies. Covering the southern portion of the Renfrewshire council area, the constituency includes around half of Paisley, as well as the smaller town of Johnstone and the villages of Kilbarchan and Elderslie. The reminder of the seat is more rural, containing the villages of Lochwinnoch, Howwood, several hamlets and farmland. The constituency also contains the Gleniffer Braes Country Park to the south and Clyde Muirshiel Regional Park to the west, notable for Castle Semple Loch.

Further to the completion of the 2023 Periodic Review of Westminster constituencies, the small town of Linwood and village of Brookfield is to be included in the constituency, alongside some minor changes in Paisley. The redrawn seat is due to be contested for the first time at the 2024 general election.

Members of Parliament
The constituency's first MP was Douglas Alexander, who had held the seat since its creation in 2005 and its predecessor Paisley South since 1997. Alexander was the Shadow Foreign Secretary, and has previously held Cabinet posts such as Transport Secretary and Scottish Secretary (2006–07; joint), and International Development Secretary (2007–10).

When SNP candidate Mhairi Black gained the seat in May 2015, she was 20 years and 237 days old, making her the youngest ever Member of Parliament (MP) elected to the House of Commons since at least the Reform Act of 1832, replacing William Wentworth-Fitzwilliam; who was 20 years and 11 months old when elected in 1832. She subsequently held the seat at the 2017 and 2019 general elections. On 4 July 2023, Black announced that she would be standing down as an MP at the next general election.