Which is most popular sport in the world? A comprehensive study of the most watched and most played sports to rank sports. Check out the top 10 sports in various countries. Get introduced to world's most popular and famous sports and share what is your favorite sport by voting on the sports popularity poll. This site is the most authentic and formal study of sports popularity in the world - a topic that is of interest to millions of sports fans around the world. The sports popularity poll is one of its kind and perhaps the largest human survey of favorite sports - its been running for more than two years with more than 10000 participants.