| National Park | Contains a variety of resources and encompasses large land or water areas to help provide adequate protection of the resources. |
| National Wildlife Refuge | Contains a variety of resources and encompasses large land or water areas to help provide adequate protection of the resources. |
| National Monument | Preserves at least one nationally significant resource. Usually smaller than a national park and lacks its diversity of attractions |
| National Preserve | Protects certain resources. Activities such as hunting, fishing or the extraction of minerals and fuels may be permitted if they do not jeopardize the natural values. |
| National Reserve | Similar to preserves, but managed by local or state authorities |
| National Lakeshore and National Seashore | Preserves shoreline areas and off-shore islands while providing water-oriented recreation. |
| National River and Wild and Scenic Riverway | Provides ribbons of land bordering on free-flowing streams that have not been dammed, channelized or otherwise altered. Besides preserving rivers in their natural state, these areas provide opportunities for outdoor activities. |
| National Scenic Trail | Long-Distance footpath winding through areas of natural beauty. |
| National Historic Site | Preserves places and commemorates persons, events and activities important in the nation's history. |
| National Historic Park | Possessing greater physical extend and complexity than National Historic Sites |
| National Military Park, Battlefield, Battlefield Park | Areas associated with American military history. |
| National Memorial | An area that is primarily commemorateive of an historical subject or person. |
| National Recreation Area | Land and water set aside for recreational use. |
| National Parkway | Encompasses ribbons of land flanking roadways and offers an opportunity of leisurely driving through areas of scenic interest. |
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