Cannabis law in Illinois (2026)
Last reviewed: 9 October 2026
In short: Adults aged 21 or over may possess and buy cannabis from licensed dispensaries; the limit is 60 g of flower for residents and 30 g for non-residents. Home growing is only for registered medical patients (up to 5 plants), and use in public places is prohibited. A medical cannabis programme operates.
| Rule | What applies |
|---|---|
| Possession for personal usePersonal use by an adult | Permitted within limits [1] |
| Quantity limitsPersonal use by an adult | Residents: 60 g of flower, 10 g of concentrate and 1,000 mg of THC in infused products. Non-residents: 30 g, 5 g and 500 mg. [1] |
| Growing at homePersonal use by an adult | Prohibited [1] |
| Sale to consumersPersonal use by an adult | Licensed retail stores for adults [1] |
| Use or carrying in public placesPersonal use by an adult | Prohibited [1] |
| Medical cannabisPersonal use by an adult | Legal for medical use [1] |
| VisitorsPersonal use by an adult | Some rules for residents only [1] |
| Minimum agePersonal use by an adult | 21 years [1] |
| Driving after cannabis usePersonal use by an adult | Driving under the influence of cannabis is an offence. It is also illegal to drive with 5 ng or more of THC per ml of whole blood, or 10 ng in another bodily substance, within 2 hours of driving. [1] |
Notes
- Limits were raised by Public Act 104-0463 (SB 3222), signed on 12 June 2026. Limits are cumulative across flower, concentrate and infused products.
- Adults without a medical registration may not grow; registered qualifying medical patients may grow up to 5 plants at home with additional restrictions.
- Public place includes anywhere others could reasonably see you and state or local government property. Local governments may authorise consumption lounges at licensed premises.
- Out-of-state adults aged 21 or over may buy and possess cannabis, but with lower limits than residents.
- Medical patients under 21 may obtain cannabis from a medical dispensary with a prescription.
Sources
- State of Illinois (Cannabis Regulation): FAQs - Illinois Cannabis Regulation (consulted 9 October 2026) · all sources
National rules that also apply
These rules are set at national level in the United States and apply here too, alongside the rules above. All national rules for the United States
| Possession for personal use | Criminal offence (source: U.S. Government Publishing Office (govinfo)) |
|---|---|
| Growing at home | Prohibited (source: U.S. Government Publishing Office (govinfo)) |
| Sale to consumers | Prohibited (source: U.S. Government Publishing Office (govinfo)) |
Illinois and neighbouring states
| State | Possession for personal use | Growing at home | Sale to consumers | Use or carrying in public places | Medical cannabis | Visitors |
|---|---|---|---|---|---|---|
| Illinois | Legal for 21+ within limits | No (medical patients only) | Licensed dispensaries | Banned in public places | Medical programme with dispensaries | Yes, but half the resident limit |
| Iowa | Criminal offence | No | No | — | Restricted medical programme | — |
| Indiana | Criminal offence (Class B misdemeanour) | No (criminal offence) | No (dealing is an offence) | — | ⚠ Not yet verified | — |
| Kentucky | Class B misdemeanour, max 45 days | No (licensed cultivators only) | Trafficking is an offence | Patients only; no smoking, no vaping in public | Medical programme (KRS 218B) | Visiting patients 21+ with out-of-state card |
| Michigan | Legal for adults 21+, within limits | Yes: up to 12 plants | Licensed retailers | Not allowed in public places | Separate medical programme | Source silent on visitors |
| Missouri | Legal for adults 21+, within limits | Yes, with a registration card | Licensed dispensaries | Banned outside licensed areas | Medical programme (ID cards) | Source silent on visitors |
| Wisconsin | Criminal offence (misdemeanour, then felony) | No (felony) | No (felony) | — | ⚠ Not yet verified | — |
More rules in Illinois
- Car speed limitsBuilt-up areas: 30 mph (15 in alleys) · Outside built-up areas (single carriageway): 55 mph
- Minimum age for a car driving licenceMinimum age for a car licence: 16 (initial licensing phase) · Earliest age to drive a car supervised: 15 (permit, enrolled in driver education)
- E-bikes and speed pedelecsLegal class: Class 1-3, bicycle rules · Minimum age: Class 3: 16
- FireworksConsumers may buy and use category F2 fireworks: No (permitted displays only)
- Knives and pepper sprayFolding pocket knives: Only with intent to use unlawfully · Locking or one-handed knives: Banned unless FOID holder or trade
- Statutory minimum wageNational statutory minimum wage: Yes · Current adult minimum wage (gross): $15.00 per hour (age 18+)
- Using a mobile phone while drivingHolding a phone while driving banned: Banned · Hands-free use: Allowed (hands-free or one-button)
- Seat belts and child seatsSeat belt compulsory in front seats: Yes, all seats · Seat belt compulsory in rear seats: Yes, all seats
- Tobacco and nicotine age limitsMinimum age to buy tobacco: 21 · Minimum age to buy e-cigarettes: 21
- Drinking age and alcohol salesMinimum age to buy beer and wine: 21 · Minimum age to buy spirits: 21
- Drink-driving limitsBlood alcohol limit for ordinary drivers: 0.08% · Lower limit for novice or young drivers: Zero (under 21)
Related pages
General information, not legal advice. Rules change: check the official source before you fly or ride.