The county of West Sussex is divided into 8 parliamentary constituencies - 2 borough constituencies and 6 county constituencies.

  Conservative †   Labour ‡   Liberal Democrat ¤

More information Constituency, Electorate ...

Constituency[nb 1]	Electorate[1]	Majority[2][nb 2]	Member of Parliament[2]		Nearest opposition[2]		Electoral wards[3][4]	Map
Arundel and South Downs CC	81,726	22,521		Andrew Griffith †		Alison Bennett ¤	Arun: Angmering, Arundel, Barnham, Findon, Walberton Chichester: Bury, Petworth, Wisborough Green Horsham: Bramber, Upper Beeding & Woodmancote, Chanctonbury, Chantry, Cowfold, Shermanbury & West Grinstead, Henfield, Pulborough & Coldwaltham, Steyning Mid Sussex: Hassocks, Hurstpierpoint & Downs
Bognor Regis and Littlehampton CC	77,446	22,503		Nick Gibb †		Alan Butcher ‡	Arun: Aldwick East, Aldwick West, Beach, Bersted, Brookfield, Felpham East, Felpham West, Ham, Hotham, Marine, Middleton-on-Sea, Orchard, Pagham & Rose Green, Pevensey, River, Wick with Toddington, Yapton
Chichester CC	85,499	21,490		Gillian Keegan †		Kate O'Kelly ¤	Chichester: Bosham, Boxgrove, Chichester East, Chichester North, Chichester South, Chichester West, Donnington, Easebourne, East Wittering, Fernhurst, Fishbourne, Funtington, Harting, Lavant, Midhurst, North Mundham, Plaistow, Rogate, Selsey North, Selsey South, Sidlesham, Southbourne, Stedham, Tangmere, West Wittering, Westbourne
Crawley BC	74,207	8,360		Henry Smith †		Peter Lamb ‡	Crawley: Bewbush, Broadfield North, Broadfield South, Furnace Green, Gossops Green, Ifield, Langley Green, Maidenbower, Northgate, Pound Hill North, Pound Hill South & Worth, Southgate, Three Bridges, Tilgate, West Green
East Worthing and Shoreham CC	75,194	7,441		Tim Loughton †		Lavinia O'Connor ‡	Adur: Buckingham, Churchill, Cokeland, Eastbrook, Hillside, Manor, Marine, Mash Barn, Peverel, St Mary's, St Nicolas, Southlands, Southwick Green, Widewater Worthing: Broadwater, Gaisford, Offington, Selden
Horsham CC	86,730	21,127		Jeremy Quin †		Louise Potter ¤	Horsham: Billingshurst & Shipley, Broadbridge Heath, Denne, Forest, Holbrook East, Holbrook West, Horsham Park, Itchingfield, Slinfold & Warnham, Nuthurst, Roffey North, Roffey South, Rudgwick, Rusper & Colgate, Southwater, Trafalgar Mid Sussex: Ardingly & Balcombe, Copthorne & Worth, Crawley Down & Turners Hill
Mid Sussex CC	85,146	19,197		Mims Davies †		Robert Eggleston ¤	Mid Sussex: Ashurst Wood, Bolney, Burgess Hill Dunstall, Burgess Hill Franklands, Burgess Hill Leylands, Burgess Hill Meeds, Burgess Hill St Andrews, Burgess Hill Victoria, Cuckfield, East Grinstead Ashplats, East Grinstead Baldwins, East Grinstead Herontye, East Grinstead Imberhorne, East Grinstead Town, Haywards Heath Ashenground, Haywards Heath Bentswood, Hayward Heath Franklands, Haywards Heath Heath, Haywards Heath Lucastes, High Weald, Lindfield
Worthing West BC	78,585	14,823		Peter Bottomley †		Beccy Cooper ‡	Arun: East Preston with Kingston, Ferring, Rustington East, Rustington West Worthing: Castle, Central, Durrington, Goring, Heene, Marine, Northbrook, Salvington, Tarring

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Under the Fifth Periodic Review of Westminster constituencies, the Boundary Commission for England decided to retain the existing 8 constituencies in West Sussex, with minor changes to realign constituency boundaries with those of current local government wards, and to reduce the electoral disparity between constituencies.

See 2023 Periodic Review of Westminster constituencies for further details.

Following the abandonment of the Sixth Periodic Review (the 2018 review), the Boundary Commission for England formally launched the 2023 Review on 5 January 2021.^[5] Initial proposals were published on 8 June 2021 and, following two periods of public consultation, revised proposals were published on 8 November 2022. The final proposals were published on 28 June 2023.

The commission has proposed that West Sussex be combined with East Sussex as a sub-region of the South East Region, resulting in the creation of a new cross-county boundary constituency named East Grinstead and Uckfield.^[6][7]

The following constituencies are proposed:

Containing electoral wards from Adur

• East Worthing and Shoreham (part)

Containing electoral wards from Arun

• Arundel and South Downs (part)
• Bognor Regis and Littlehampton
• Chichester (part)
• Worthing West (part)

Containing electoral wards from Chichester

• Arundel and South Downs (part)
• Chichester (part)

Containing electoral wards from Crawley

• Crawley

Containing electoral wards from Horsham

• Arundel and South Downs (part)

• Horsham

Containing electoral wards from Mid Sussex

• East Grinstead and Uckfield (also contains parts of Lewes and Wealden Districts in East Sussex)
• Mid Sussex

Containing electoral wards from Worthing

• East Worthing and Shoreham (part)
• Worthing West (part)

Primary data source: House of Commons research briefing - General election results from 1918 to 2019^[8]

2019

The number of votes cast for each political party who fielded candidates in constituencies comprising West Sussex in the 2019 general election were as follows:

More information Party, Votes ...

Party	Votes	%	Change from 2017	Seats	Change from 2017
Conservative	257,463	56.3%	0.6%	8	0
Labour	103,446	22.6%	6.2%	0	0
Liberal Democrats	75,512	16.5%	8.2%	0	0
Greens	17,239	3.8%	1.1%	0	0
Others	3,920	0.8%	2.5%	0	0
Total	457,580	100.0		8

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A cell marked → (with a different colour background to the preceding cell) indicates that the previous MP continued to sit under a new party name.

The Local Government Act 1972 moved the District of Mid Sussex into West Sussex from East Sussex. This change was put into effect in the Parliamentary constituency boundaries for the 1983 boundary changes.

Since 1885 only two MPs have won elections who were not members of the Conservative Party: one Liberal MP in 1923 and one Labour MP in 1997, 2001 and 2005.

• List of parliamentary constituencies in the South East (region)