Seneca Post Office

Post office

121 E. Amour St, Seneca, IL 61360

Hours are not published. Call before you go.

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

Book at USPS Directions Facilities in Seneca Facilities in Illinois

Seneca Post Office accepts new U.S. passport applications in person in Seneca, IL. First-time and child visits are booked on the USPS scheduler. Search ZIP 61360. How to apply · How to renew