Chicago follows Illinois state law, where marijuana is fully legal for adult recreational use and medical patients under a regulated cannabis system. Adults 21 and older can legally possess and purchase weed from state-licensed dispensaries within the city, though specific limits apply based on residency, product type, and where cannabis is consumed. This page explains Chicago’s current marijuana legality, including possession limits, purchasing rules, public use restrictions, local enforcement practices, and how city regulations align with broader Illinois law. For readers who want to compare Chicago’s cannabis laws with other locations, see our comprehensive breakdown of cannabis regulations by location across U.S. states, major cities, and countries worldwide in the Cannabis Laws by Location guide.
Table of Contents
Is marijuana legal in Chicago
Legal Status
- Recreational Use: Legal for adults 21 and over since January 1, 2020.
- Medical Use: Legal with a valid Illinois Medical Cannabis Patient Program (MCPP) card.
Possession Limits
- Illinois Residents:
- Non-Residents:
- 15g flower
- 2.5g concentrate
- 250mg THC
Purchasing
- Legal only from state-licensed dispensaries.
- Valid ID required; must be 21+ (or a registered medical patient).
Where Use is Allowed
- Permitted:
- Private residences
- Licensed cannabis lounges (if available)
- Prohibited:
- Public spaces (streets, parks, bars)
- Vehicles
- Near schools, daycare centers, or federal property
Driving
- Driving under the influence is illegal.
- Legal THC blood limit: 5 ng/mL.
- DUI penalties apply.
Employment
- Employers may enforce drug-free policies.
- Off-duty cannabis use can still lead to disciplinary action.
Housing
- Landlords may prohibit cannabis use or possession on their property.
Taxes
- Recreational cannabis is taxed based on THC content and product type.
- Medical cannabis is not subject to the same high tax rates.
Summary: Marijuana is legal in Chicago with clear limits. Use it responsibly, only where allowed, and stay informed about your rights and restrictions.
