Mid Sussex is a constituency[n 1] represented in the House of Commons of the UK Parliament from 2024 by Alison Bennett, a Liberal Democrat.

[2][n 2] The constituency is centred around the towns of Haywards Heath and Burgess Hill and takes in the southern half of the local government district of the same name.

The constituency was created in 1974 from parts of the seats of Lewes and East Grinstead, and has undergone significant boundary changes at every periodical review that it has been around for.

He was succeeded by Nicholas Soames (a grandson of former Prime Minister Winston Churchill), who had been MP for the neighbouring seat of Crawley from 1983 to 1997.

Following boundary changes for the 2024 general election, Davies stood down and decided to stand (successfully) for the notionally safer new seat of East Grinstead and Uckfield.

In 2017, Labour consolidated this lead at the 2017 general election by gaining almost double the votes of the Liberal Democrats.