Cannabis and Other Drugs
410 ILCS 705/10-10 — at 21 a resident may hold 60 grams of flower, and possession outside the Act is graded by weight
| Possession limit at 21 or older | A resident | A visitor |
|---|---|---|
| Possession limit at 21 or olderCannabis flower | A resident60 grams | A visitor30 grams |
| Possession limit at 21 or olderCannabis concentrate | A resident10 grams | A visitor5 grams |
| Possession limit at 21 or olderTHC in cannabis infused products | A resident1000 milligrams | A visitor500 milligrams |
Who handles this in Illinois: Illinois State Bar Association, Illinois Lawyer Finder; and legal aid programs and the state offices, listed in the Illinois directory.
- The limits are cumulative, so what a person holds in each form counts together.
- Possessing, using, buying or transporting cannabis within the limit is not a criminal or civil offense under State law or local ordinance for a person 21 or older.
- Growing at home is limited to registered medical cannabis patients 21 or older, up to 5 plants more than 5 inches tall per household, in an enclosed, locked space out of public view.
The Act does not allow using cannabis in any public place, in any motor vehicle, on a school bus or school grounds, or knowingly close to anyone under 21 who is not a registered patient, and it does not stop a private business from banning cannabis on its property, including its parking areas.
| Cannabis possessed outside the Act | What it is |
|---|---|
| Cannabis possessed outside the ActNot more than 10 grams | What it isA civil law violation, a fine of $100 to $200 |
| Cannabis possessed outside the ActMore than 10 up to 60 grams | What it isClass B misdemeanor |
| Cannabis possessed outside the ActMore than 60 up to 100 grams | What it isClass A misdemeanor |
| Cannabis possessed outside the ActMore than 100 up to 500 grams | What it isClass 4 felony |
| Cannabis possessed outside the ActMore than 500 up to 2,000 grams | What it isClass 3 felony |
| Cannabis possessed outside the ActMore than 2,000 up to 5,000 grams | What it isClass 2 felony |
| Cannabis possessed outside the ActMore than 5,000 grams | What it isClass 1 felony |
Other drugs. Knowingly possessing a controlled or counterfeit substance is unlawful. In an amount the section does not list for higher penalties, it is a Class 4 felony with a fine of up to $25,000, and larger amounts of listed drugs, such as 15 grams or more of a substance containing heroin, are Class 1 felonies with longer terms.
Sources for this section (5)
- 410 ILCS 705/10-10 — Possession limit
- 410 ILCS 705/10-5 — Personal use of cannabis; restrictions on cultivation; penalties
- 410 ILCS 705/10-35 — Limitations and penalties
- 720 ILCS 550/4 — 720 ILCS 550/4
- 720 ILCS 570/402 — 720 ILCS 570/402
Legal information, not legal advice. Verified as of October 2026. Applying it to a particular situation is the work of a licensed Illinois attorney.