Offline Casino Play in Person: Yes, multiple locations.Offline Betting in Person: Yes, multiple locations.Minimum Gambling Age in Nevada: 21 (inland), 18 (through offshore sites).Legal Gambling: Yes, inland, online, and offshore.For sports betting, check out our online sports betting in Nevada page. Nevada may be the most gambling-friendly state in the US, but does that friendliness expand online? Find out below with our summary of the Nevada gambling state of play.