| Property | Address | City | Date Listed |
|---|---|---|---|
| Backbone State Park Historic District | Jct. of Co. Rds. C57 and W69 | Strawberry Point | 12/23/1991 |
| Backbone State Park Cabin--Bathing Area (Area A) | Jct. of Co. Hwy. W69 and Co. Hwy. C54 | Dundee | 11/15/1990 |
| Backbone State Park Picnicking Hiking & Camping Area (Area B) | Jct. of Co. Hwy. W69 and Co. Hwy. C54 | Dundee | 11/15/1990 |
| Backbone State Park Richmond Springs (Area C) | Jct. of Co. Hwy. W69 and Co. Hwy. C54 | Dundee | 11/15/1990 |
| Bay Settlement Church and Monument | SW of Delhi | Delhi | 09/13/1977 |
| Coffin's Grove Stagecoach House | 3 mi. W of Manchester | Manchester | 02/20/1975 |
| Delaware County Courthouse | Main Street | Manchester | 07/02/1981 |
| Hoag J. J. House | 120 E. Union Street | Manchester | 08/13/1976 |
| Kirkpatrick, Robert Round Barn | 3342 120th Avenue | Coggon | 04/06/2005 |
| Lincoln Elementary School | 401 Lincoln Street | Manchester | 10/24/2002 |
| Old Lenox College | College Street | Hopkinton | 12/19/1974 |
| McGee School | Jct. Of 197th and 145th Aves. | Manchester Vicinity | 10/14/1999 |
| Saints Peter and Paul Church | Jct. of C64 and X47 | Petersburg | 01/24/1995 |
| Spring Branch Butter Factory Site | Address Restricted | Manchester | 06/28/1974 |