List of I Party Stores in Riverside, CA Outlet Note Regular Brands I Party California Riverside Rating 4.5 based on 63 votes Official Website http://www.partycity.com/ Products Art Entertainment Party Rentals NameAddressPhone Name/Address/Phone I Party outlet - Riverside 6493 Magnolia Ave (951) 335-8580 I Party outlet - Riverside 4810 La Sierra Ave (951) 353-2709 I Party outlet - Riverside 6293 Tyler St, Ste A (951) 354-0420 People Also Viewed