The 2009 RBS Twenty-20 Cup was the fifth edition of the RBS sponsored Twenty-20 Cup in Pakistan. Held in Lahore from 25 to 29 May 2009, the tournament was won by the Sialkot Stallions, who claimed their fourth overall and consecutive title by defeating the Lahore Lions in the final.
This tournament was held immediately before the 2009 ICC World Twenty20, which Pakistan won.
The top team from each of the four groups qualified for the semi-finals.