Citizens auto insurance is sold by Citizens Insurance, and the parent company is Hanover Insurance, one of the largest insurance companies in the U.S. Most of Hanover’s insurance business does not come from its auto insurance product lines, however in spite of this it is the 24th largest auto insurance company in the United States. Citizens offers unique discounts for residents of the state of Massachusetts as well as a wide range of coverage options and supplementary insurance add-ons. It is a financially stable and established insurance company backed by a large and stable publicly traded company.