Pursuant to state law, adults over age 21 can legally possess, consume, and purchase cannabis in Illinois beginning January 1, 2020.
Cannabis can be consumed at entities with an on-premises consumption license as well as on private property, subject to the discretion of the property owner. Public consumption is illegal. This includes streets, parks, and areas adjacent to licensed dispensaries.
It is illegal to consume cannabis in any vehicle (moving or not) and operating a vehicle under the influence of cannabis is illegal. Cannabis can be transported in a vehicle but during transportation cannabis cannot be accessible by any occupant of the vehicle and must be in a child-resistant container.
Cannabis purchased in Illinois cannot be transported to another state.
Cannabis may be purchased at licensed dispensaries (between the hours of 6 a.m. and 10 p.m.) and possession limitations [1] are as follows:
| Type of Substance | Illinois Residents | Non-residents |
| Cannabis | 30 grams | 15 grams |
| Cannabis-Infused Products[2] | 500 milligrams of THC[3] | 250 milligrams of THC |
| Cannabis Concentrate[4] | 5 grams | 2.5 grams |
A list of adult-use cannabis dispensaries in Illinois can be found here.
[1] An individual may possess up to the limitation for each category.
[2] A cannabis-infused product is a product containing cannabis that is not intended to be smoked, such as food, topical formations, etc..
[3] THC refers to “tetrahydrocannabinol,” the primary psychoactive compound found in cannabis.
[4] Cannabis Concentrates are products derived from cannabis by extracting the psychoactive compounds found in cannabis, such as oils, creams, etc.