The 2009 competition had over 40 teams participating across all three regions.

The world semi-final was held on 13 October 2009 between the National Law School of India University (India) and University of Strathclyde (United Kingdom).  The world final was held on 15 October 2009 at the Solomon Law Park, Daejeon, Korea.

The problem, Case Concerning the Deployment and Use of Force in Low Earth Orbit (Fornjot v Telesto), was written by Ricky J. Lee (Australia).

Winner:
National Law School of India University (India)
Shwetank Ginodia, Abhimanyu George Jain and Raeesa Vakil
Coached by Dr. Sairam Bhat

Runner-Up:
Georgetown University (United States)
Christina Calce and Lorinda Laryea
Coached by Prof. Paul Larsen

Semi-Finalist:
University of Strathclyde (United Kingdom)
Emma Boffey, Stephen Donnelly and Laura Mackenzie
Coached by Ms. Aimée Asante

Best Memorials:
Georgetown University (United States)

Best Oralist:
Raeesa Vakil (National Law School of India University)

Semi-Final Judges:
Prof. Stephan Hobe (Germany)
Prof. Ram Jakhu (Canada)
Prof. Sang-Myun Rhee (Republic of Korea)

Final Judges:
Judge Abdul G. Koroma (Sierra Leone)
Judge Peter Tomka (Slovakia)
Judge Leonid Skotnikov (Russia)