US Casino Links article on Hawaii casinos and gambling
Hawaii is one of the two remaining states in the US where all forms of gambling are considered illegal (the other being Utah). There are neither casinos nor state lotteries in Hawaii. Any form of betting or pari-mutuel betting is not considered legal. Even games and raffles for charitable purposes are outlawed. So long as there's an element of chance involving a reward or an item to be won, Hawaii Gambling Laws deem all of these as illegal.