Downtown Ottawa Post Office 3 years ago ID: #425249 Listed In : Government Offices 405 W Main St, Ottawa, IL 61350 815-433-2021 https://postofficeshours.com/il/ottawa/downtown-ottawa/ [email protected] Business Description San Francisco Post Office in San Francisco County, CA 94123. USPS Post office locations hours and phone numbers. Reviews & Ratings Write a Review No Review. Please login / register to add your review. Tags : ottawa il post office ottawa post office