Marshall County Iowa (Historic Districts) has 2 places on the National Register of Historic Places.
Some of the country's most noteable architects helped create the Marshall County places including John C. Cochrane. Prominent architectural styles found in Marshall Country are Italianate, Late 19th And 20th Century Revivals and Prairie School.
Marshalltown Downtown Historic District
(added 2002 - - #01001463)
Roughly bounded by 2nd St., State St., 3rd. Ave., and E. Church St. , Marshalltown