Automated Postal Center - Gloster 125 Main St Gloster, LA 71030 Phone : (318) 933-8439 Business Category Automated Postal Centers Toll-Free           (800) ASK-USPS Post Office - Gloster 125 Main St Gloster, LA 71030 Phone : (318) 933-8439 Business Category Post Offices Toll-Free           (800) ASK-USPS