I would say that soccer is probably the most widely known and played sport all over the world, with other sports being more popular in particular countries. Football is obviously very popular in the US, and particularly in the Northeast and Southeast areas. Basketball is very popular in the more northern states, but both football and basketball are very common US sports. Football is becoming better known in other areas of the world as some football teams played preseason games in other countries. Sports like gymnastics seem to be quite universal as well.