Some of the cities, towns, and places in Sioux County are Alton, Boyden, Buncombe, Capel, Center, Chatsworth, Eagle, East Orange, Floyd, Garfield, Grant, Granville, Hawarden, Holland, Hospers, Hull, Ireton, Lincoln, Logan, Lynn, Matlock, Maurice, Nassau, Orange City, Plato, Reading, Rock, Rock Valley, Settlers, Sheldon, Sheridan, Sherman, Sioux, Sioux Center, Washington, Welcome, West Branch
Sioux County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 35,872. Its county seat is Orange City. Its largest city is Sioux Center.