The 2016 London mayoral election was held on 5 May 2016 to elect the Mayor of London, on the same day as the London Assembly election. It was the fifth election to the position of mayor, which was created in 2000 following a referendum in Greater London. The election used a supplementary vote system.
The election was won by the Member of Parliament (MP) for Tooting, Sadiq Khan, a member of the Labour Party, who polled 56.8% of the votes in the head-to-head second round of voting over the MP for Richmond Park, Zac Goldsmith, a member of the Conservative Party. Goldsmith was more than 25% ahead of the next candidate in the first round of voting, as part of a record field of twelve candidates. Of the twelve candidates only Khan, Goldsmith, and Green Party candidate Siân Berry achieved the requisite 5% minimum first round vote share to retain their deposit.