The Capital One Arena in Washington will be the first major team pro sports facility in the United States to have a sports betting parlor, officials announced Thursday.

Betting kiosks in stadiums are common in many countries, but have yet to start appearing in the United States, which has long had stricter laws that have effectively barred sports gambling in most states.

But recent legal changes, including a United States Supreme Court ruling last year that allowed states to legalize sports betting, have opened up new markets. And as more states authorize gambling, taking bets in an arena where a game is going on has become part of the wider debate.

William Hill, which runs betting parlors all around Britain, will operate the Washington facility. “We rent to McDonald’s and Dunkin’ Donuts and now William Hill,” said Ted Leonsis, the chief executive of Monumental Sports, which owns the arena and its two main tenants, the Wizards of the N.B.A. and the Capitals of the N.H.L.