The Hartford Insurance Claims & Payments The Hartford Financial Services Group, usually known as The Hartford, is a USA-based investment and insurance company. The Hartford is a Fortune 500 company headquartered in Hartford, Connecticut. 800-243-5860 Claims P.O. Box 2917Hartford, CT 06192 Click for Claims Website 800-624-5578 Payments P.O. Box 2917Hartford, CT 06192 Click for Payments Website