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POLITICS

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United Kingdom

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Largest Parties by Membership

This list features the largest British political parties by the estimated number of official members.

RANK

PARTY

MEMBERSHIP

1

Labour

333,235

2

Reform UK

234,654

3

Conservatives

123,000

4

Liberal Democrats

90,000

5

Scottish National Party (SNP)

64,000

6

Green Party of England and Wales

54,000

7

Co-operative Party

13,194

8

Plaid Cymru

10,000

9

Scottish Greens

7,646

10

Alba Party

7,475


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References

LabourList. (2025). Labour Party membership drops by tens of thousands since general election. Available at: https://labourlist.org/2025/02/labour-party-membership-drop-since-general-election/ (Accessed 1 December 2025). Reform UK. (n.d.). Membership counter. Available at: https://www.reformparty.uk/counter (Accessed 1 December 2025). House of Commons Library. (2023). Membership of UK political parties. Available at: https://researchbriefings.files.parliament.uk/documents/SN05125/SN05125.pdf (Accessed 1 December 2025). Liberal Democrats. (n.d.). Liberal Democrats official website. Available at: https://www.libdems.org.uk/ (Accessed 1 December 2025). College Green Group. (n.d.). Is there a future for the UK’s main political parties? Available at: https://collegegreengroup.com/blogs/uk-politics/is-there-a-future-for-the-uks-main-political-parties/ (Accessed 1 December 2025). BBC News. (2024). Inside the crisis facing Britain's political parties. Available at: https://www.bbc.com/news/articles/ceq5yqq91ppo (Accessed 1 December 2025). LabourList. (2024). Co-operative Party membership rises by 50% since 2019 general election. Available at: https://labourlist.org/2024/01/co-operative-party-membership-growth-2019-general-election/ (Accessed 1 December 2025). The Guardian. (2024). Women’s Equality party to vote on whether to disband. Available at: https://www.theguardian.com/politics/2024/oct/26/womens-equality-party-to-vote-on-closing (Accessed 1 December 2025). Electoral Commission. (2024). Statement of accounts: Labour Party 2023. Available at: https://search.electoralcommission.org.uk/Api/Accounts/Documents/25309 (Accessed 1 December 2025). Matchett, C. (2023). [Post about party membership figures]. Available at: https://x.com/conor_matchett/status/1650490185350623235 (Accessed 1 December 2025). Co-operative Party. (2022). Board report 2022. Available at: https://party.coop/publication/board-report-2022 (Accessed 1 December 2025).
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