| Tournament details | |
|---|---|
| Country | Cambodia |
| Venue(s) | RSN Stadium, Phnom Penh |
| Dates | 16 February – 25 November 2021 |
| Teams | 34 |
| Final positions | |
| Champions | Visakha (2nd title) |
| Runner-up | Preah Khan Reach |
| Third place | Boeung Ket |
| Tournament statistics | |
| Top goal scorer(s) | Keo Sokpheng (7 goals) |
| Best player | Ouk Sovann |
The 2021 Hun Sen Cup is the 15th season of the Hun Sen Cup, the premier football knockout tournament in Cambodia, for association football clubs in Cambodia involving Cambodian League and provincial teams organized by the Football Federation of Cambodia. Visakha won the cup after beating Nagaworld 2-0 in the 2020 final. It was Visakha's first time winning the cup. The competition is split into 2 stages, provincial stage and national stage. The top three teams from provincial stage will enter the national stage with the 13 teams in Cambodian League 2021.