Country

The 1984 summer Olympics in Los Angeles, California inspired Academic Decathlon founder Dr. Robert Peterson to make Academic Decathlon an international competition. Nationals in the United States remains open to international teams. The below list is possibly incomplete because the full list of Nationals participants is not available for most years before 2003 (1987, 1994, 1995, 1998, and 2001 are the only exceptions).

Countries Participating in Academic Decathlon

Country	Most Recent Champion	Year(s) Participated	Score of Most Recent Champion
Brazil	Unknown	1989	Unknown
Canada	The Westside Miniversity	2004, 2016-2017	Unknown
China	Shanghai High School International Division	2014-present	50,072.3
Ireland	Unknown	1989	Unknown
Mexico	Unknown	1984	Unknown
New Zealand	Unknown	1984	Unknown
South Korea	Unknown	1984	Unknown
United Kingdom	Southbank International School, London	2009, 2011-present	Unknown