What Is the Largest Indoor Stadium in the United States?

As of 2014, AT&T Stadium in Arlington, Tex., formerly known as Cowboys Stadium, is the largest indoor stadium in the United States and the world's largest domed structure, according to dfwfootball.com. The facility is the venue of the Dallas Cowboys and hosts college football's annual Cotton Bowl Classic each January.

The stadium spans 3 million square feet, with a seating capacity of 80,000 for football games and the ability to expand to 105,000, including standing room, for other events. The facility broke ground in 2005 and officially opened in 2009. It played host to the 2010 NBA All-Star game and set a basketball world record with 108,713 fans in attendance. The $1.15-billion facility features more than 300 executive suites, a retractable roof and the second-largest high-definition television screen in the world.