The seat is Logan, while the biggest city is Missouri Valley. It borders Monona, Crawford, Shelby and Pottawattamie Counties in Iowa; as well as Washington and Burt Counties in Nebraska.
Main highways include I-29, US-30, IA-37, IA-44, IA-127 and IA-191.
Cities
Dunlap
Little Sioux
Logan
Missouri Valley
Woodbine