Automated Postal Center - Irmo 7821 Saint Andrews Rd Irmo, SC 29063 Phone : (803) 781-4024 Business Category Automated Postal Centers Toll-Free           (800) ASK-USPS Fax           (803) 781-5822 Post Office - Irmo 7821 Saint Andrews Rd Irmo, SC 29063 Phone : (803) 781-4024 Post Office - Irmo Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (803) 781-5822