When it comes to land based venues you have to be 21 to attend to any of the two major casinos – Foxwoods and Mohegan Sun. Partaking in lottery draws, off-track betting and charitable games within the state has an age requirement of 18. As for online casinos there is no official restriction as the state doesn’t support gambling on these in the first place. Therefore the minimum age at these will vary. At some Connecticut casinos online you have to be 18 and at some you have to be 21.