The 2021 Diamond League, also known as the 2021 Wanda Diamond League for sponsorship reasons, was the twelfth season of the annual series of outdoor track and field meetings, organised by World Athletics.

US$50,000 will be awarded to one man and one woman in each of the sprints, hurdles, distance runnings, jumps, and throws.

Two of them did not take place: the Diamond League Shanghai (14 August) and a would be new Diamond League Shenzhen (22 August), both of which were cancelled due to restrictions related to the COVID-19 pandemic.

Additionally, the Golden Gala was relocated from Rome to Florence and pushed back to 10 June.

[6] On 27 May the Anniversary Games were confirmed to be moved to Gateshead and renamed the Müller British Grand Prix.