Post Offices
Post Offices in & near Holmes Corner, Illinois. Operating hours, locations, phone/fax number, services information.
Grantsburg Post Office
Post Office in Grantsburg, Illinois on State Route 146 E. Operating hours, phone number, services information, and other locations.
Address: 8655 State Route 146 E, Grantsburg, IL 62943
Phone: 618-658-8570
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457