| Property | Address | City | Date Listed |
|---|---|---|---|
| Berkhimer Bridge | 245th Street over Des Moines River | Humboldt vicinity | 5/15/98 |
| Des Moines River Bridge | IA 3 over West Fork of Des Moines River | Humbolt vicinity | 5/15/98 |
| Brown Corydon House | E of Dakota City off IA 3 | Dakota City | 11/14/1978 |
| Humboldt County Courthouse | 203 Main Street | Dakota City | 8/28/2003 |
| Humboldt Free Public Library | 30 6th Street N. | Humboldt | 05/23/1983 |
| Renwick Generating Plant | 103 N. Field Street | Renwick | 02/17/1995 |
| Taft, Stephen Harris House | 809 First Avenue | Humboldt | 12/27/2002 |