residents who win at any of the state’s 12 casinos need to be aware that their winnings are subject to a 30% withholding tax by the IRS. for those who like to gamble, but it might surprise some to know that Pennsylvania is the second-most popular spot for those looking to ask lady luck for a hand.Īnd more and more tourists are heading to Pennsylvania to play poker, the slots, table games, keno, bingo, and bet on the horses. Nevada might be the top destination in the U.S.