The 2021 Arab Cup U-20 (Arabic: كأس العرب للمنتخبات تحت 20 سنة) was the fifth edition of the Arab Cup U-20. It was hosted by Egypt from 20 June to 6 July 2021. The tournament included 12 UAFA-member teams and four invited teams. Senegal were the defending champions but were eliminated in the quarter-finals. Saudi Arabia beat Algeria 2–1 in the final to win their first title.