Key facts
- UK Labour Party membership fell by 20% in 2025.
- Labour had 264,754 members in 2025.
- Labour had 333,235 members in 2024.
- Keir Starmer resigned as prime minister in June 2025.
- Labour's membership has been falling since 2023.
The UK Labour Party's membership has fallen by 20% in 2025, a decrease from 333,235 members in 2024 to 264,754 members in the current year. This decline has taken place under the leadership of Keir Starmer, who resigned from his position as prime minister in June 2025. The party has been experiencing a downward trend in its membership numbers since 2023, with the latest figures indicating a continued loss of support. The reasons behind this sustained drop in membership have not been detailed in the provided information, but it marks a significant challenge for the party as it navigates the post-Starmer leadership period.