Post Offices in & near Ontario, Wisconsin. Operating hours, locations, phone/fax number, services information.
Post Office in Ontario, Wisconsin on Main St. Operating hours, phone number, services information, and other locations.
Address: 321 Main St, Ontario, WI 54651
Phone: 608-337-4722
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
