Passport Application Services - Ontario 88 Sw 2nd Ave Ontario, OR 97914 Phone : (541) 889-6692 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Fax           (541) 889-8385 Post Office - Ontario 88 Sw 2nd Ave Ontario, OR 97914 Phone : (541) 889-6692 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (541) 889-8385