World Rugby Chairman Bernard Lapasset told the RTS: "The Rugby World Cup 2015 will be remembered as the biggest tournament to date"
From New Zealand beating Australia in the final to Japan's defining win against South Africa, the Rugby World Cup 2015 has been recorded as the second most-watched rugby tournament after England got through to the final in 2007.
A record number of television audiences tuned in to watch the games.
ITV told the RTS: "Overall the tournament reached 32 million viewers which is 55% of the UK population."
The broadcaster revealed that the most-watched match was England v Wales, which was watched by 11.6 million.
In comparison with the last World Cup in 2011, World Rugby announced that this year's opening ceremony led to a greater amount of online interaction.
Lapassett told the RTS: "England 2015 has been the most competitive, best-attended, most-watched, most socially engaged, most commercially successful Rugby World Cup."