Monumental Sports Network, formerly NBC Sports Washington, is an American regional sports network owned by Ted Leonsis through Monumental Sports & Entertainment. Headquartered in Washington, D.C., the channel broadcasts regional coverage of sports events throughout the Mid-Atlantic, with a focus on professional sports teams based in Baltimore and Washington, D.C., as well as sports news and entertainment programming.

Theodore John Leonsis is an American businessman. He is a former senior executive with America Online (AOL), and the founder, chairman, and CEO of Monumental Sports & Entertainment, which owns the Washington Wizards, Washington Capitals, Washington Mystics, and Monumental Sports Network.