| 2011 Hun Sen Cup | |
| Dates: | 07 Jan - 12 Mar 2011 |
| Num Teams: | 32 |
| Champions: | Preah Khan Reach |
| Runner-Up: | Build Bright United |
| Top Goal Scorer: | Khuon Laboravy (22 goals) |
| Prevseason: | 2010 |
| Nextseason: | 2012 |
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.
The matches were arranged in four regions, two groups in each region. The teams finishing in the top two positions in each of the eight groups in Group stage progressed to the Round of 16 playing in Phnom Penh.
Group A - Prek Pra Keila, Kon Rithysen, Banteay Meanchey, Mekong Kampuchea University
Group B - Build Bright United, Battambang, Oddar Meanchey, Pailin
Group C - Preah Khan Reach, Preah Vihear, Chhlam Samuth, Kratie
Group D - Phnom Penh Crown, Kampong Thom, Baksey Chamkrong, Neak Khiev
Group E – Chhma Khmao, Western University, Stung Treng, Kandal
Group F - National Defense, Prey Veng, Police Commissary, Life University
Group G - Nagacorp, Takeo, Kep, Sihanoukville Autonomous Port
Group H - Kirivong Sok Sen Chey, Kampong Speu, Kampot, Koh Kong[1]
| Hun Sen Cup 2011 Champions Preah Khan Reach 1st Title |