An uninsured motorist clause is a provision commonly found in United States automobile insurance policies that provides for a driver to receive damages for any injury he or she receives from an uninsured, negligent driver. The owner of the policy pays a premium to the insurance company to include this clause. Although not exclusive, this coverage is typically added to an automobile insurance policy. In the event of a qualifying accident, the insurance company pays the difference between what the uninsured driver can pay and what the injured driver would be entitled to as if the uninsured motorist had proper insurance.

This type of coverage is meant to prevent the possibility that a motorist will have to pay for medical expenses and property damage to his vehicle as a result of the accident with the underinsured at-fault motorist. The ramifications related to being hit by an underinsured motorist vary by individual state laws.

It is mandatory for the insurance carrier to provide such coverage in some states, such as Pennsylvania, Illinois, Maryland, and New York.