Illinois Marijuana Laws (2026)
Is marijuana legal in Illinois? Complete guide to Illinois cannabis laws including possession limits, penalties, medical program details, and what happens if you're charged.
Illinois Marijuana Status at a Glance
Is Marijuana Legal in Illinois?
Marijuana in Illinois is currently: Legal (recreational)
Illinois legalized recreational marijuana January 1, 2020
Illinois Marijuana Possession Penalties
| Amount | Penalty |
|---|---|
| Small Amount | Legal (up to 30g for residents) |
| Large Amount | 31–100g: civil violation; over 100g: felony |
Illinois Medical Marijuana Program
Illinois has an active medical marijuana program. Qualifying patients with a valid medical marijuana card are permitted to possess and use cannabis for approved medical conditions. Possession limits and qualifying conditions vary — check with the Illinois Department of Health for current program details.
Recreational Marijuana in Illinois
Illinois has legalized recreational marijuana for adults 21 and older. Adults may legally purchase cannabis from licensed dispensaries and possess up to the legal limit. Using marijuana in public, driving under the influence of marijuana, and providing marijuana to minors remain illegal.
Marijuana DUI in Illinois
Even in states where marijuana is legal, driving under the influence of cannabis is a criminal offense in Illinois. Law enforcement can charge you with DUI/DWI if you are impaired while driving, regardless of whether marijuana is legal in the state. There is no universally agreed-upon THC blood level equivalent to alcohol's 0.08% BAC — impairment is assessed by officers and drug recognition experts.