Post Offices in & near Flag Spring, Ohio. Operating hours, locations, phone/fax number, services information.
Post Office in Waterloo, Ohio on State Route 141. Operating hours, phone number, services information, and other locations.
Address: 23461 State Route 141, Waterloo, OH 45688
Phone: 740-643-0122
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457