San Marcos Post Office

Post office

210 S Stagecoach Trail, San Marcos, TX 78666

By appointment only, please call (512) 392-4831 5 APPOINTMENTS PER DAY.

Appointment required

Hours and addresses come from the State Department listing, updated November 2, 2026.

Book at USPS Directions Facilities in San Marcos Facilities in Texas

San Marcos Post Office accepts new U.S. passport applications in person in San Marcos, TX. First-time and child visits are booked on the USPS scheduler. Search ZIP 78666. How to apply · How to renew

Other facilities in San Marcos

City Of San Marcos