| Tournament details | |
|---|---|
| Country |  Cambodia |
| Teams | 33 |
| Final positions | |
| Champions | Phnom Penh Crown |
| Runner-up | Nagacorp |
| Tournament statistics | |
| Top goal scorer(s) | Kouch Sokumpheak (21 goals) |
The Hun Sen Cup is the main football knockout tournament in Cambodia. The 2009 Hun Sen Cup was the 3rd 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.
Phnom Penh Crown were the defending champions, having beaten Preah Khan Reach 1–0 in the previous season's final.