What is most popular football league in the world?

Answer 1

In terms of popularity the English Premier League is top, it boasts the most famous clubs in the world and the League is followed by millions of dedicated fans from all parts of the Globe.

Do not mistake popularity for being the best, on a technical level La Liga (the Spanish league) is (probably) superior than the English Premier League.

Answer 2

The English Premier League is the most popular league in the world, it may not be the highest ranking in every factor; such as quality, but in terms of popularity it is by far higher ranked than any other league in the world with millions of dedicated viewers in many countries other than England.