Election Office DetailsRebecca Spencer, Registrar of Voters2724 Gateway DriveRiverside, CA 92507-0918Phone: (951) 486-7200Fax: (951) 486-7272Hours: 8:00 a.m. – 5:00 p.m. Monday through FridayEmail: rovweb@co.riverside.ca.usVisit the Riverside County Election website for more information.How to vote in Riverside CountyHow to Vote By Mail