Ohio Casualty is a member of Liberty Mutual Insurance. Liberty Mutual Agency Corporation operates under a unique regional/national model that leverages the service-oriented focus of regional operations with the cost efficiencies of a national infrastructure to deliver quality products and services to agents and brokers and the customers they serve. Ohio Casualty offers its insurance products in Delaware, the District of Columbia, Kentucky, Maryland, Ohio, Pennsylvania, Virginia, and West Virginia. The home office is located in Boston, Massachusetts.