Office of the City Clerk Passport Acceptance Facility 3025 Madison Street, Riverside, CA 92504 . Use our Form Filler to fill out your form and print it.For the best experience, use a desktop or laptop computer. Our form wizard will help you and your family know what passport form(s) to use. The Riverside Post Office, located at 15445 N. 5400 W., now accepts passport applications from 9 am to noon, and 1 pm to pm, Monday Friday. The RIVERSIDE MAIN POST OFFICE, located in RIVERSIDE, CA serves as an official location for submitting applications for United States passports. Select your passport type and processing speed. To get started, select "Submit," which says "Complete Online and Print. " This takes you to the passport application; it's a DS-82 or DS-11. When Riverside, California residents use Traveldocs.