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Cook County, IL Public Conduct: Public Marijuana Use (2026)

Significant Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Smoker fine
Up to $100 per violation
Buffer distance
15 feet from entrances/exits
Coverage
Enclosed public places countywide
Definition
Covers lighted weed, not just tobacco

Summary

Cook County's Clean Indoor Air Ordinance defines "smoking" to include lighted weed, not just tobacco, and bars it in enclosed public places and workplaces countywide, plus within 15 feet of their doors.

City-specific rules exist: Oak Lawn, Tinley Park, Arlington Heights, Skokie, Evanston, Chicago, and Oak Park have their own public marijuana use rules that differ from Cook County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

Smoke or smoking ... means ... The carrying, smoking, burning, inhaling, or exhaling of any kind of lighted pipe, cigar, cigarette, hookah, weed, or other lighted tobacco product in any manner or in any form... Smoking shall be prohibited in all enclosed public places and places of employment within the County of Cook... Smoking is prohibited within 15 feet of any entrance, exit, windows that open or ventilation intakes to an enclosed area in which smoking is prohibited.

Source: Illinois Cannabis Regulation and Tax ActView official code

Full Breakdown

Cook County's Clean Indoor Air Ordinance (Code of Ordinances Ch. 38, Art. IX) defines "smoking" as carrying, burning, or inhaling any lighted pipe, cigar, cigarette, hookah, or weed: language that folds cannabis into the same ban as tobacco. The ordinance bars smoking in enclosed public places and workplaces across the County of Cook, covering restaurants, transit, shopping malls, sports arenas, and public meeting rooms, plus within 15 feet of their entrances, exits, and operable windows. The Cook County Department of Public Health and local law enforcement field complaints and conduct inspections for compliance.

Violations & Fines

Smoking marijuana where prohibited is an infraction with a fine up to $100 per person, per day; an operator who lets violations continue faces fines from $250 up to $2,500 and possible license suspension.

Frequently Asked Questions

Does Cook County's smoking ban cover marijuana?
Yes. Section 38-203 defines "smoking" to include any lighted pipe, cigar, cigarette, hookah, or weed, so lighting cannabis indoors is treated the same as lighting a cigarette.
Where can't I smoke marijuana in Cook County?
Not in any enclosed public place or workplace covered by Section 38-205, and not within 15 feet of their entrances, exits, or operable windows.

Sources & Official References

Other rules in Cook County

All Cook County rules

Compare Cook County to another location·View the Illinois public conduct overview

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Public Marijuana Use in Cities Across Cook County