Luton South is a constituency^{[n 1]} in Bedfordshire represented in the House of Commons of the UK Parliament since 2019 by Rachel Hopkins, a member of the Labour Party.^{[n 2]}

Under the 2023 Periodic Review of Westminster constituencies, the constituency will only be subject to minor boundary changes, but is to be renamed Luton South and South Bedfordshire - to be first contested at the next general election.^[3]

The constituency covers the southern and eastern areas of Luton, inclusive of the town centre and Luton Airport. It also comprises the rural country house estate of Luton Hoo, in addition to the late medieval Someries Castle, and the villages/hamlets, extending south to the border of Hertfordshire and the town of Harpenden. The areas of Luton it spans include Stopsley, Wigmore, Butterfield Green, Hart Hill, Wardown Park, Bury Park, Dallow, Farley Hill, New Town, and Stockwood Park.

Outside of the actual Borough of Luton, it also encompasses the small village of East Hyde on the Hertfordshire border, as well as Slip End and Caddington, which are near the M1 motorway.

Demographically, the constituency is mixed, with large southern Asian communities in the Bury Park and Farley Hill areas. The largest community is White British, though Africans and Afro-Caribbeans, as well as newer immigrant arrivals from Eastern Europe, form substantial parts of the population.

The town centre features The Mall Luton (the town's main shopping centre), the University of Bedfordshire Luton campus, and various amenities such as The Galaxy entertainment complex, and Luton railway station on the Midland Main Line. Luton Town FC, currently of the Premier League, is within the constituency, as would be their intended new home stadium at Power Court (to the immediate east of The Mall Luton). The railway station serving London Luton Airport, Luton Airport Parkway, is also within the constituency. A new rail link is being constructed between this station and the airport, which is due to be opened in 2021.

Vauxhall still makes vehicles in this area, although the operations have reduced greatly since a large part of the facility closed in the early 2000s.

This seat was created in 1983, primarily from the former seat of Luton East.

The constituency and its predecessors the Luton East and Luton constituencies were long considered a bellwether (they had elected an MP from the winning party in each election since the 1951 general election). Margaret Moran, who was the Labour MP from 1997, stood down at the 2010 general election after falsifying claims for her expenses.^[4]

Bellwether status ended in the 2010 general election, when the constituency elected a Labour MP while the Conservatives were the largest party in the House of Commons. As a result, its new MP Gavin Shuker became one of just two Labour MPs elected in 2010 in the East of England, alongside Kelvin Hopkins, the MP for the Luton North seat. Shuker and Hopkins served as MPs for the two divisions of Luton at the two subsequent elections with increasing majorities, although the majority in South has not been larger than that of North since 2001.

In the 2019 general election, Shuker stood as an independent but was defeated by the Labour Party candidate, Rachel Hopkins - the daughter of Kelvin, who did not stand in Luton North after losing the Labour whip in 2017.

• List of parliamentary constituencies in Bedfordshire
• Politics in Luton