Timely: California became the world's largest regulated commercial market for recreational marijuana in January 2018, joining Alaska, Washington, Oregon, Nevada, Maine, Massachusetts, Vermont and Colorado Another 29 states, plus the territories of Guam and Puerto Rico, and the District of Colombia, have legalized marijuana for medicinal use, and at least 12 of those states are poised to consider legalization of recreational marijuana in 2018 (Vermont, New Jersey, Michigan,