On 6 May 2021, 25 Members of the London Assembly were elected using the Additional Member System with 14 members from single-member constituencies and 11 from a single London-wide region. This was the sixth election to the London Assembly, with the previous election in 2016.
In addition to 14 single-member constituencies, London elects 11 additional members from a single London-wide region.
| Barnet and Camden | Lab hold | ||
| Bexley and Bromley | Con hold | ||
| Brent and Harrow | Lab hold | ||
| City and East | Lab hold | ||
| Croydon and Sutton | Con hold | ||
| Ealing and Hillingdon | Lab hold | ||
| Enfield and Haringey | Lab hold | ||
| Greenwich and Lewisham | Lab hold | ||
| Havering and Redbridge | Con hold | ||
| Lambeth and Southwark | Lab hold | ||
| Merton and Wandsworth | Lab hold | ||
| North East | Lab hold | ||
| South West | Con hold | ||
| West Central | Con hold |