| Property | Address | City | Date Listed |
|---|---|---|---|
| Adams-Higgins House | 1215 N. Grand Ave. | Spencer | 09/27/1984 |
| Clay County Courthouse | W. 4th Street and 3rd Ave. W. | Spencer | 07/02/1981 |
| Grand Avenue Historic Commercial District | 301-605 Grand Avenue; 12-18, 21 W. 5th Street; 10,13, 15-19 W. 4th Street | Spencer | 12/17/2004 |
| Kirchner Philip and Anna Parrish Log House | 4969 120th Ave. | Peterson | 09/02/1993 |
| Little Sioux River Bridge | 210th Ave. over Little Sioux River | Spencer vicinity | 6/25/98 |
| Logan Center School No. 5 | Jct. Of 420th Street and 310th Avenue | Dickens | 1/16/2001 |
| Ross Seymour Round Barn | Off IA 374 | Gillet Grove | 06/30/1986 |
| Spencer High School and Auditorium | 104 E. 4th St. | Spencer | 02/12/2010 |
| Wanata State Park Picnic Shelter | S of jct. of Co. Rd. M27 and IA 10 | Peterson | 11/15/1990 |