The largest city is North Sioux City, while the seat is Elk Point. It is named for the Civil War sentiments. It was originally named Coles County.
Main Highways include I-29, SD-11, SD-19, SD-46, SD-48 and SD-50.
It borders Lincoln and Clay Counties in South Dakota, Dakota and Dixon Counties in Nebraska and Sioux, Plymouth and Woodbury Counties in Iowa.
North Sioux City