List of Denny's Stores in Humboldt, IA Outlet Note Regular Brands Denny's Iowa Humboldt Rating 4.8 based on 89 votes Products Fast Food Restaurant Pancake House Coffee Shop Steakhouse NameAddressPhone Name/Address/Phone Denny's outlet - Humboldt 4 Sumner Ave, #1 (515) 332-5017 People Also Viewed