So far the following nations have taken part in the World Schools Debating Championships since their inception in 1988.
- Argentina
- Australia
- Bangladesh
- Belarus
- Belgium
- Bermuda
- Botswana
- Brunei
- Canada
- Chile
- Cook Islands
- Croatia
- Cyprus
- Czech Republic
- England
- Estonia
- Finland
- France
- Germany
- Greece
- Hong Kong
- Hungary
- India
- Indonesia
- Ireland
- Israel
- Italy
- Jamaica
- Israel
- Italy
- Jamaica
- Japan
- Kenya
- Kuwait
- Latvia
- Lesotho
- Lithuania
- Malaysia
- Mexico
- Moldova
- Mongolia
- Montenegro
- Namibia
- Netherlands
- New Zealand
- Nigeria
- Pakistan
- Peru
- Philippines
- Poland
- Portugal
- Qatar
- Romania
- Rwanda
- Scotland
- Singapore
- Slovakia
- Slovenia
- South Africa
- South Korea
- Spain
- Sri Lanka
- Swaziland
- Sweden
- Switzerland
- Thailand
- Turkey
- Ukraine
- USA
- Wales
- Zimbabwe
Of these, only Australia, Canada, England and the USA have competed in every World Championships.
Where possible we have included a link to the country’s national schools debating federation.