that depends on how you determine popularity. Baseball has more players and fans, but they have more games.

Football has the most per game and the most to watch their championships, so it is probably football.

Football, baseball, golf, soccer, tennis, volleyball, swimming, water polo.. The list goes on. Football and baseball are arguably America's most beloved sports/pastimes.

Cheer leading (it is a sport) football, basketball, baseball, and ice hockey. Soccer, polo, swimming, etc. aren't as well known.

baseball, football, basketball

basketball