2024 London mayoral election

The 2024 London mayoral election was held on 2 May 2024 to elect the next mayor of London. It took place simultaneously with elections to the London Assembly, some local council by-elections in London and regular local elections elsewhere in England and Wales. Following the Elections Act 2022, voting in this election took place under the first-past-the-post system for the first time and only time, replacing the supplementary vote system. The result of the election was announced on 4 May 2024.

Sadiq Khan of the Labour Party, who has served as the mayor of London since 2016, was re-elected as mayor and became the first person to be elected to the role for three terms. The Conservative Party stood former London Assembly Conservative leader Susan Hall as its candidate, the Green Party nominated Hackney borough councillor Zoë Garbett, the Liberal Democrats nominated Rob Blackie, and Reform UK nominated Howard Cox. There were eight other candidates.

The mayor of London has responsibilities covering policing, transport, housing, planning, economic development, arts, culture and the environment. They control a budget of around £18 billion per year. Mayors are typically elected for a period of four years, with no limit to the number of terms served. Under the Greater London Authority Act 1999, mayoral elections are held on the first Thursday in May in the fourth calendar year following the previous election, unless varied by an order by the Secretary of State. On 13 March 2020, the government announced the election would be postponed until 2021 due to the COVID-19 pandemic. The change in election date has been ignored when setting the date of the following election. Consequently, this election was held only three years after the 2021 London mayoral election that saw the Labour mayor Sadiq Khan re-elected.