An Illinois conviction for marijuana possession is unlikely to affect your car insurance rates, unless the conviction was also related to driving, such as driving under the influence of marijuana. Every car insurance company is different, but they typically raise your rates only for traffic-related offenses. However, a marijuana DUI can cause your rates to rise substantially depending on the insurance carrier.
For more information on the consequences of a DUI on your car insurance, see our article How a DUI Affects Your Car Insurance.
Follow this link for more information about Illinois Marijuana Laws and Illinois Medical Marijuana Laws