Passport Application Services - High Ridge Postal Store 6 Dillon Plaza Dr High Ridge, MO 63049 Phone : (636) 677-7528 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Post Office - High Ridge Postal Store 6 Dillon Plaza Dr High Ridge, MO 63049 Phone : (636) 677-7528 Business Category Post Offices Toll-Free           (800) ASK-USPS