The 2011 Special Olympics World Summer Games (Greek: Ειδικοί παγκόσμιοι καλοκαιρινοί αγώνες Ολυμπιακών Αγώνων 2011, Eidikoí pankósmioi kalokairinoí agónes Olympiakón Agónon 2011), was a sporting event in Athens, Greece.

The opening ceremony of the games took place on 25 June 2011 at the Panathenaic Stadium and the closing ceremony was held on 4 July 2011.

Over 7,500 athletes, from 185 countries, competed in a total of 22 sports.

[1] This is a list of countries participating[citation needed] in the 2011 Special Olympics World Summer Games (Greek: Pankósmioi Therinoí Agónes Athína 2011):