Post Office - Elkton 5785 County Road 305 Elkton, FL 32033 Phone : (904) 692-2099 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (904) 692-2099 United States Government--internal Revenue Service, Post Offices, Elkton 4935 State Road 207 Elkton, FL 32033 Phone : (904) 692-2099 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools