Thirty-three states and the District of Columbia currently have passed laws broadly legalizing marijuana in some form.
The District of Columbia and 10 states — Alaska, California, Colorado, Maine, Massachusetts, Michigan, Nevada, Oregon, Vermont and Washington — have adopted the most expansive laws legalizing marijuana for recreational use. Most recently, Michigan voters approved a ballot measure permitting adults age 21 and over to purchase and possess recreational-use marijuana. Vermont became the first state earlier this year to legalize marijuana for recreational use through the legislative process, rather than via a ballot measure. Vermont’s law allows for adults age 21 and over to grow and possess small amounts of cannabis. However, it does not permit the sale of nonmedical cannabis. Some other state laws similarly decriminalized marijuana, but did not initially legalize retail sales.
Most other states allow for limited use of medical marijuana under certain circumstances. Some medical marijuana laws are broader than others, with types of medical conditions that allow for treatment varying from state to state. Louisiana, West Virginia and a few other states allow only for cannabis-infused products, such as oils or pills. Other states have passed narrow laws allowing residents to possess cannabis only if they suffer from select medical illnesses.
A number of states have also decriminalized the possession of small amounts of marijuana.
Read More at http://www.governing.com/gov-data/safety-justice/state-marijuana-laws-map-medical-recreational.html