The $1.4 billion resort casino which spans five city blocks, includes a 24-story hotel with 234 guest rooms and 74 suites, 10 of which are luxury suites. MGM National Harbor, a subsidiary of MGM Resorts International (NYSE: MGM), is located in Oxon Hill and portrays the rich history and atmosphere of Prince George’s County, while at the same time meeting the needs of the sophisticated Maryland marketplace. Betting on sports futures, props and lay bets.