The 2020–21 King Cup, or The Custodian of the Two Holy Mosques Cup, was the 46th edition of the King Cup since its establishment in 1957. The tournament commenced on 16 December 2020 and concluded with the final on 27 May 2021. The number of teams was reduced from 64 to 16 as a result of the COVID-19 pandemic in Saudi Arabia. The competition was limited to the 16 teams participating in the 2020–21 Saudi Professional League. Al-Hilal are the defending champions after defeating Al-Nassr 2–1 in the final. Al-Hilal were eliminated by Al-Fateh in the round of 16.