Milton Keynes South was a constituency[a] represented in the House of Commons of the UK Parliament from its 2010 creation until 2024 by Iain Stewart, a Conservative.

This new constituency was a very large part of the former Milton Keynes South West, which had been held by Phyllis Starkey for Labour for 13 years until the 2010 general election.

In the 2015 general election, Iain Stewart again won the Milton Keynes South constituency for the Conservative Party.

[4] At its creation the constituency comprised the electoral wards of Bletchley and Fenny Stratford, Danesborough, Denbigh, Eaton Manor, Emerson Valley, Furzton, Loughton Park, Stony Stratford, Walton Park, Whaddon and Woughton.

Further to the completion of the 2023 review of Westminster constituencies, the seat was abolished prior to the 2024 general election, with its contents distributed three ways:[3]