At each Rugby World Cup tournament, there have been at least 16 nations taking part. In total over the years 25 nations have participated at the World Cup at least once. Below is listed all the countries that have at some time participated at the Rugby World Cup.
The nations that have never missed a tournament, playing in all eight so far are: Argentina, Australia, Canada, England, France, Ireland, Italy, Japan, New Zealand, Scotland and Wales.
Here are the 20 teams that participated at the 2019 Rugby World Cup in Japan. There were no debuting nations.
- New Zealand
- South Africa
- United States