No — you cannot legally smoke or consume marijuana in public in Illinois.
Public spaces banned: Using cannabis in streets, parks, sidewalks, bars, restaurants, or any motor vehicle (including boats and motorcycles) is prohibited.
Schools and government property: Cannabis use is not allowed on school grounds, government buildings, or near anyone under 21.
Private residences only: The only safe and legal place to consume cannabis is inside your own home — unless your landlord or property rules prohibit it.
Visibility matters: Even on private property, you cannot consume cannabis in a way that is visible to the public (for example, on your front porch).
Penalties: Violating public use laws can result in fines or other legal consequences.