| Great Smoky Mountains | 9,951,197 | 1 |
| Grand Canyon | 4,894,769 | 2 |
| Yosemite | 3,996,500 | 3 |
| Yellowstone | 3,601,693 | 4 |
| Rocky Mountain | 3,447,870 | 5 |
| Zion | 3,233,651 | 6 |
| Olympic | 3,137,907 | 7 |
| Grand Teton | 2,824,532 | 8 |
| Acadia | 2,605,536 | 9 |
| Cuyahoga Valley | 2,359,884 | 10 |
| Glacier | 2,320,217 | 11 |
| Gateway Arch | 2,006,982 | 12 |
| Joshua Tree | 1,728,215 | 13 |
| Hawaii Volcanoes | 1,565,752 | 14 |
| Bryce Canyon | 1,565,676 | 15 |
| Hot Springs | 1,380,780 | 16 |
| Shenandoah | 1,248,024 | 17 |
| Mount Rainier | 1,201,686 | 18 |
| Arches | 1,194,247 | 19 |
| Haleakala | 1,097,150 | 20 |
| Sequoia | 1,060,315 | 21 |
| Death Valley | 1,041,596 | 22 |
| Everglades | 989,970 | 23 |
| Badlands | 931,199 | 24 |
| Capitol Reef | 783,314 | 25 |
| Saguaro | 721,678 | 26 |
| Petrified Forest | 666,467 | 27 |
| Theodore Roosevelt | 607,803 | 28 |
| Kings Canyon | 577,854 | 29 |
| Wind Cave | 571,858 | 30 |
| Mesa Verde | 542,916 | 31 |
| Canyonlands | 539,336 | 32 |
| Crater Lake | 532,266 | 33 |
| Mammoth Cave | 519,706 | 34 |
| Biscayne | 504,554 | 35 |
| Denali | 481,744 | 36 |
| Glacier Bay | 480,802 | 37 |
| Redwood | 432,380 | 38 |
| Virgin Islands | 432,377 | 39 |
| Lassen Volcanic | 425,829 | 40 |
| Carlsbad Caverns | 422,600 | 41 |
| Big Bend | 359,403 | 42 |
| Channel Islands | 307,829 | 43 |
| Great Sand Dunes | 307,125 | 44 |
| Kenai Fjords | 291,727 | 45 |
| Pinnacles | 229,210 | 46 |
| Voyageurs | 227,996 | 47 |
| Black Canyon of the Gunnison | 198,211 | 48 |
| Guadalupe Mountains | 175,588 | 49 |
| Congaree | 121,036 | 50 |
| Great Basin | 105,880 | 51 |
| Wrangell St Elias | 72,362 | 52 |
| Dry Tortugas | 62,764 | 53 |
| Katmai | 36,825 | 54 |
| North Cascades | 24,164 | 55 |
| Isle Royale | 17,972 | 56 |
| American Samoa | 17,321 | 57 |
| Lake Clark | 13,402 | 58 |
| Kobuk Valley | 11,939 | 59 |
| Gates of the Arctic | 11,038 | 60 |