U S Government--post Office Blair, SC 29015 Phone : (803) 635-4314 Business Category Post Offices Government Offices & Public Schools Post Office - Blair 96 Granite Rd Blair, SC 29015 Phone : (803) 635-4314 Post Office - Blair Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (803) 635-4314