Players can now legally join real money blackjack sites from five states: New Jersey, Michigan, Pennsylvania, West Virginia, and Connecticut. Online casinos have only started becoming legal in the US, since the overturning of PASPA in 2018. Look below for a rundown and sign up to play blackjack for free: Are Free Blackjack Sites Legal in the US? Playing free blackjack games is straightforward in the best social blackjack casinos. Platforms like BetRivers.Net, Fortune Coins, and Chumba Casino offer several blackjack variants alongside online slots, poker, and more. Generally speaking, social casino apps are legal across all US states other than Washington.