If you’re looking to visit any of the land based casinos you have to be 21 if liquor is served at the venue. If it isn’t you’ll be allowed in at 18. At this age you can also partake in charitable bingo, raffles and the state lottery. When it comes to online gambling all of the best Wisconsin casinos that we have listed on top of the page allow you to sign up and play with them at the age of 18.