| b>U.S. National Parks |
| style="background:#efefef;" | Name | colspan="2" style="background:#ffdead;" | Date |
| a href="/encyclopedia/Yellowstone-National-Park" title="Yellowstone National Park">Yellowstone | 1872 |
| a href="/encyclopedia/Sequoia-National-Park" title="Sequoia National Park">Sequoia | 1890 |
| a href="/encyclopedia/Yosemite-National-Park" title="Yosemite National Park">Yosemite | 1890 |
| a href="/encyclopedia/Mount-Rainier-National-Park" title="Mount Rainier National Park">Mount Rainier | 1899 |
| a href="/encyclopedia/Crater-Lake-National-Park" title="Crater Lake National Park">Crater Lake | 1902 |
| a href="/encyclopedia/Wind-Cave-National-Park" title="Wind Cave National Park">Wind Cave | 1903 |
| a href="/encyclopedia/Mesa-Verde-National-Park" title="Mesa Verde National Park">Mesa Verde | 1906 |
| a href="/encyclopedia/Glacier-National-Park" title="Glacier National Park">Glacier | 1910 |
| a href="/encyclopedia/Rocky-Mountain-National-Park" title="Rocky Mountain National Park">Rocky Mountain | 1915 |
| a href="/encyclopedia/Hawaii-Volcanoes-National-Park" title="Hawaii Volcanoes National Park">Hawaii Volcanoes | 1916 |
| a href="/encyclopedia/Haleakala-National-Park" title="Haleakala National Park">Haleakala | 1916 |
| a href="/encyclopedia/Lassen-Volcanic-National-Park" title="Lassen Volcanic National Park">Lassen Volcanic | 1916 |
| a href="/encyclopedia/Denali-National-Park" title="Denali National Park">Denali | 1917 |
| a href="/encyclopedia/Acadia-National-Park" title="Acadia National Park">Acadia | 1919 |
| a href="/encyclopedia/Grand-Canyon-National-Park" title="Grand Canyon National Park">Grand Canyon | 1919 |
| a href="/encyclopedia/Zion-National-Park" title="Zion National Park">Zion | 1919 |
| a href="/encyclopedia/Hot-Springs-National-Park" title="Hot Springs National Park">Hot Springs | 1921 |
| a href="/encyclopedia/Bryce-Canyon-National-Park" title="Bryce Canyon National Park">Bryce Canyon | 1928 |
| a href="/encyclopedia/Grand-Teton-National-Park" title="Grand Teton National Park">Grand Teton | 1929 |
| a href="/encyclopedia/Carlsbad-Caverns-National-Park" title="Carlsbad Caverns National Park">Carlsbad Caverns | 1930 |
| a href="/encyclopedia/Great-Smoky-Mountains-National-Park" title="Great Smoky Mountains National Park">Great Smoky Mountains | 1934 |
| a href="/encyclopedia/Shenandoah-National-Park" title="Shenandoah National Park">Shenandoah | 1935 |
| a href="/encyclopedia/Olympic-National-Park" title="Olympic National Park">Olympic | 1938 |
| a href="/encyclopedia/Kings-Canyon-National-Park" title="Kings Canyon National Park">Kings Canyon | 1940 |
| a href="/encyclopedia/Isle-Royale-National-Park" title="Isle Royale National Park">Isle Royale | 1940 |
| a href="/encyclopedia/Mammoth-Cave-National-Park" title="Mammoth Cave National Park">Mammoth Cave | 1941 |
| a href="/encyclopedia/Big-Bend-National-Park" title="Big Bend National Park">Big Bend | 1944 |
| a href="/encyclopedia/Everglades-National-Park" title="Everglades National Park">Everglades | 1947 |
| a href="/encyclopedia/Virgin-Islands-National-Park" title="Virgin Islands National Park">Virgin Islands | 1956 |
| a href="/encyclopedia/Petrified-Forest-National-Park" title="Petrified Forest National Park">Petrified Forest | 1962 |
| a href="/encyclopedia/Canyonlands-National-Park" title="Canyonlands National Park">Canyonlands | 1964 |
| a href="/encyclopedia/Redwood-National-and-State-Parks" title="Redwood National and State Parks">Redwoods | 1968 |
| a href="/encyclopedia/North-Cascades-National-Park" title="North Cascades National Park">North Cascades | 1968 |
| a href="/encyclopedia/Arches-National-Park" title="Arches National Park">Arches | 1971 |
| a href="/encyclopedia/Capitol-Reef-National-Park" title="Capitol Reef National Park">Capitol Reef | 1971 |
| a href="/encyclopedia/Guadalupe-Mountains-National-Park" title="Guadalupe Mountains National Park">Guadalupe Mountains | 1972 |
| a href="/encyclopedia/Voyageurs-National-Park" title="Voyageurs National Park">Voyageurs | 1975 |
| a href="/encyclopedia/Badlands-National-Park" title="Badlands National Park">Badlands | 1978 |
| a href="/encyclopedia/Theodore-Roosevelt-National-Park" title="Theodore Roosevelt National Park">Theodore Roosevelt | 1978 |
| a href="/encyclopedia/Channel-Islands-National-Park" title="Channel Islands National Park">Channel Islands | 1980 |
| a href="/encyclopedia/Biscayne-National-Park" title="Biscayne National Park">Biscayne | 1980 |
| a href="/encyclopedia/Gates-of-the-Arctic-National-Park-and-Preserve" title="Gates of the Arctic National Park and Preserve">Gates of the Arctic | 1980 |
| a href="/encyclopedia/Glacier-Bay-National-Park-and-Preserve" title="Glacier Bay National Park and Preserve">Glacier Bay | 1980 |
| a href="/encyclopedia/Katmai-National-Park" title="Katmai National Park">Katmai | 1980 |
| a href="/encyclopedia/Kenai-Fjords-National-Park" title="Kenai Fjords National Park">Kenai Fjords | 1980 |
| a href="/encyclopedia/Kobuk-Valley-National-Park" title="Kobuk Valley National Park">Kobuk Valley | 1980 |
| a href="/encyclopedia/Lake-Clark-National-Park-and-Preserve" title="Lake Clark National Park and Preserve">Lake Clark | 1980 |
| a href="/encyclopedia/Wrangell-St.-Elias-National-Park-and-Preserve" title="Wrangell-St. Elias National Park and Preserve">Wrangell-St. Elias | 1980 |
| a href="/encyclopedia/Great-Basin-National-Park" title="Great Basin National Park">Great Basin | 1986 |
| a href="/encyclopedia/National-Park-of-American-Samoa" title="National Park of American Samoa">American Samoa | 1988 |
| a href="/encyclopedia/Dry-Tortugas-National-Park" title="Dry Tortugas National Park">Dry Tortugas | 1992 |
| a href="/encyclopedia/Death-Valley-National-Park" title="Death Valley National Park">Death Valley | 1994 |
| a href="/encyclopedia/Joshua-Tree-National-Park" title="Joshua Tree National Park">Joshua Tree | 1994 |
| a href="/encyclopedia/Saguaro-National-Park" title="Saguaro National Park">Saguaro | 1994 |
| a href="/encyclopedia/Black-Canyon-of-the-Gunnison-National-Park" title="Black Canyon of the Gunnison National Park">Black Canyon of the Gunnison | 1999 |
| a href="/encyclopedia/Cuyahoga-Valley-National-Park" title="Cuyahoga Valley National Park">Cuyahoga Valley | 2000 |
| a href="/encyclopedia/Congaree-National-Park" title="Congaree National Park">Congaree | 2003 |
| a href="/encyclopedia/Great-Sand-Dunes-National-Park-and-Preserve" title="Great Sand Dunes National Park and Preserve">Great Sand Dunes | 2004 |