| Property | Address | City | Date Listed |
|---|---|---|---|
| Le Grand Bridge | Co. Rd. T37 over backwater of Iowa River | Le Grand vicinity | 5/15/98 |
| Marshalltown Downtown Historic District | 200 block E. Main to 100 block W. Main, side streets | Marshalltown | 1/17/2002 |
| Minerva Creek Bridge | Co. Rd. S52 over Minerva Creek | Clemons vicinity | 5/15/98 |
| Quarry Bridge | Co. Rd. I-4 over Iowa River | Marshalltown vicinity | 5/15/98 |
| Binford Thaddeus House | 110 N. 2nd Ave. | Marshalltown | 01/12/1984 |
| Dobbin Round Barn | Off CR S52 | State Center | 06/30/1986 |
| Edel Matthew Blacksmith Shop and House | 1st Street and 3rd Ave. | Haverhill | 03/11/1983 |
| First Church of Christ Scientist | 412 W. Main Street | Marshalltown REMOVED | 5/22/98 |
| Glick--Sower House | 201 E. State Street | Marshalltown | 04/22/1993 |
| Marshall County Courthouse | Courthouse Square | Marshalltown | 11/21/1972 |
| State Center Commercial Historic district | Main Street Blks 200-100 West and 100 East | State Center | 9/20/2002 |
| Sunday Robert H. House | 1701 Woodfield Rd. | Marshalltown | 11/09/1988 |
| Watson's Grocery | 106 Main St. | State Center | 10/22/98 |
| Whitehead C. H. House | 108 N. 3rd Street | Marshalltown | 01/15/1979 |
| Willard Leroy R. House | 609 W. Main Street | Marshalltown | 10/22/1976 |