Where is Yum Yum Donuts? It is located at Yum Yum Donuts 1431 E 4th St, Ontario, CA 91764, United States. You can get directions for Yum Yum Donuts, who is in the Donut shop category. You can find up-to-date information on 1431 E 4th St, Ontario, CA 91764, United States Donut shop companies on our website.