Specific: Siouxland is a unique tri-state area region covering Iowa, Nebraska, and South Dakota. Selling and listing homes in Woodbury County, the Siouxland communities of Sioux City, Sgt. Bluff, Le Mars, Merrill, Hinton; So Sioux City, NE, Dakota City, NE; North Sioux City, South Dakota, Dakota Dunes, South Dakota.