Did You Know? The most popular sport in the United States all around is the sport of football. It owns the top 61 of the largest stadiums or arenas in the US. The first stadium that makes the list used for other sports or multipurpose is RingCentral Coliseum in Oakland, California that is used by the MLB’s Oakland Athletics. It holds 63,026 spectators and was also the former home of the Oakland Raiders on separate occasions until they relocated to Las Vegas.