| Units |
| National Monuments | Agate Fossil Beds |
| Scotts Bluff | |
| National Historical Parks | Homestead |
| Wild & Scenic Rivers | Missouri (Multi-State) |
| Niobrara |
| Non-Units |
| National Historic Sites | Chimney Rock |
| National Historic Trails | California (Multi-State) |
| Lewis & Clark (Multi-State) | |
| Mormon Pioneer (Multi-State) | |
| Oregon (Multi-State) | |
| Pony Express (Multi-State) |