The seat and largest city is Marshalltown. It is named for John Marshall, the fourth justice of the supreme court.
It borders Hardin, Grundy, Tama, Jasper and Story Counties.
Main Highways include US-30, IA-14, IA-146, IA-330 and IA-96.
Cities
Albion
Green Mountain
LeGrand
Marshalltown
Melbourne
Rhodes
State Center