House located at 3331 Sunnyside Rockford, Illinois 61101. It has 3 beds, 2 bathrooms, and is 1915 square feet. The property was built in 1966. 3331 Sunnyside Rockford, Illinois 61101 is in the Rockford neighborhood. Rockford , Boone County , and Out of Area Winnebago Cnty are nearby neighbourhoods.