| Tournament details | |
|---|---|
| Country |  Cambodia |
| Dates | 07 Jan - 12 Mar 2011 |
| Teams | 32 |
| Final positions | |
| Champions | Preah Khan Reach |
| Runner-up | Build Bright United |
| Tournament statistics | |
| Top goal scorer(s) | Khuon Laboravy (22 goals) |
Hun Sen Cup, the main football knockout tournament in Cambodia. The 2011 Hun Sen Cup was the fifth season of the Hun Sen Cup, the premier knockout tournament for association football clubs in Cambodia involving Cambodian League and provincial teams organized by the Football Federation of Cambodia.
National Defense were the defending champions, having beaten Phnom Penh Crown 3–2 in the previous season's final.