How's Pot Doing in Illinois?
Cannabis is 90% Legal in Illinois
Last reviewed: January 13, 2026
Is it legal for adults to possess cannabis in the state of Illinois?
YES
"For a person who is 21 years of age or older and a resident of this State, the possession limit is as follows: (1) 30 grams of cannabis flower; (2) no more than 500 milligrams of THC contained in cannabis-infused product; (3) 5 grams of cannabis concentrate." - ilga.gov
Is it legal for adults to buy cannabis in a store in the state of Illinois?
YES
""Adults 21 and older with a valid identification can purchase cannabis at any Illinois dispensary."" - cannabis.illinois.gov
Is it legal for adults to grow cannabis in the state of Illinois?
NO
"Only Registered Qualifying Medical Cannabis Patients may grow up to 5 cannabis plants at home" - cannabis.illinois.gov
Is it legal for medical marijuana patients to possess cannabis in the state of Illinois?
YES
"A registered qualifying patient is not subject to arrest, prosecution, or denial of any right or privilege, including, but not limited to, civil penalty or disciplinary action by an occupational or professional licensing board, for the medical use of cannabis in accordance with this Act, if the registered qualifying patient possesses an amount of cannabis that does not exceed an adequate supply as defined in subsection (a) of Section 10 of this Act of usable cannabis…" - ilga.gov
Is it legal for medical marijuana patients to buy cannabis in a store in the state of Illinois?
YES
""Registered qualifying patients and designated caregivers may purchase medical cannabis from a licensed medical cannabis dispensary in Illinois. Patients are no longer required to designate a single dispensary and may purchase from any licensed medical dispensary in the state."" - idfpr.illinois.gov
Is it legal for medical marijuana patients to grow cannabis in the state of Illinois?
YES
"Only Registered Qualifying Medical Cannabis Patients may grow up to 5 cannabis plants at home." - cannabis.illinois.gov