I have seen a lot of articles online trying to determine what are the most popular sports in the world, and almost without exception Soccer (World Football) is listed on top. I came up with the idea of looking at the page view stats on Wikipedia to see what sport pages are the most popular. Surprisingly, the highest ranked Sport page was in fact Basketball. This would partly be due to the high US based traffic to the English version Wikipedia site, but mostly it was because the stats for Soccer is split between Soccer and Association Football pages.
When all the stats are combined, soccer (football) regains it title of the most popular sport in the world! See more analysis of the World’s Most Popular Sports According to Wikipedia.