Sterling Township is located in Whiteside County, Illinois. As of the 2010 census, its population was 18,035 and it contained 8,003 housing units. Geography According to the 2010 census, the township has a total area of , of which (or 95.51%) is land and (or 4.49%) is water. Demographics References External links City-data.com Whiteside County Official Site Townships in Whiteside County, Illinois Townships in Illinois