From ESPN:

Pennsylvania

The Hollywood Casino at Penn National Race Course booked the first legal sports bets in Pennsylvania in mid-November 2018. The move came just over a year after Gov. Tom Wolf signed a new sports betting bill as part of a broad legislation push that included online poker and Daily Fantasy Sports (DFS). The October 2017 bill became effective after the Supreme Court's May 2018 ruling upending the federal ban on single-game betting outside of Nevada. A number of other sportsbooks have also obtained a license to operate in Pennsylvania. In a June 15, 2018 letter to Pennsylvania officials, the NFL expressed concerns about consumer protections and data enforcement issues under the bill.

Rhode Island

The Twin River Casino in Lincoln opened its doors for legal sports betting on Nov. 26, 2018. The move came five months after Gov. Gina Raimondo signed the state budget, which included language allowing sports betting. Only two locations would be allowed to offer sports betting under the law, with the state's lottery providing regulatory oversight. The new law does not provide for mobile betting.