Illinois and the U.S. territories of Guam and the U.S. Virgin Islands have legalized marijuana for use by adults, age 21 and over. (Legalization in Illinois will go into effect on January 1, 2020.)
Marijuana use was decriminalized in Hawaii, New Mexico, New York, and North Dakota. “Decriminalization” typically means it’s not a crime for adults to possess small amounts of marijuana, but it may still be confiscated and, in some states, people may face civil fines (fees) for possessing it.
Read more on https://teens.drugabuse.gov