If there is not and age under a form of gambling, then it’s most likely illegal in Pennsylvania. Whereas, the legal age for pari-mutuel betting, state lottery, bingo, and Daily Fantasy Sports is only 18. As you can see the legal gambling age for casino wagering, online casino gaming, sports betting, and any form of poker are 21. In the table above we have outlined the legal gambling ages for all forms of legal activities in Pennsylvania.