Marshall County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 40,105. The county seat and largest city is Marshalltown. The county was formed on January 13, 1846, and named after John Marshall, Chief... Wikipedia
Cities: Marshalltown, State Center, Liscomb, and more
County seat: Marshalltown
Population: 39,879 (2022)
Area: 573 mi²
Named for: John Marshall