1: The Republic of Acadia NP Pop: 5,420 Mil 2: The Republic of American Samoa NP Pop: 5,454 Mil 3: The Republic of Arches NP Pop: 5,458 Mil 4: The Republic of Badlands NP Pop: 5,450 Mil 5: The Republic of Big Bend NP Pop: 5,449 Mil 6: The Republic of Biscayne NP Pop: 5,522 Mil 7: The Republic of Black Canyon of the Gunnison NP Pop: 5,453 Mil 8: The Republic of Bryce Canyon NP Pop: 5,432 Mil 9: The Republic of Canyonlands NP Pop: 5,501 Mil 10: The Republic of Capitol Reef NP Pop: 5,455 Mil 11: The Republic of Carlsbad Caverns NP Pop: 5,444 Mil 12: The Republic of Channel Islands NP Pop: 5,492 Mil 13: The Republic of Congaree NP Pop: 5,460 Mil 14: The Republic of Crater Lake NP Pop: 5,457 Mil 15: The Republic of Cuyahoga Valley NP Pop: 5,428 Mil 16: The Republic of Death Valley NP Pop: 5,464 Mil 17: The Republic of Denali NP Pop: 5,452 Mil 18: The Republic of Dry Tortugas NP Pop: 5,460 Mil 19: The Republic of Everglades NP Pop: 5,489 Mil 20: The Republic of Gates of the Arctic NP Pop: 5,488 Mil 21: The Republic of Gateway Arch NP Pop: 5,469 Mil 22: The Republic of Glacier Bay NP Pop: 5,443 Mil 23: The Republic of Glacier NP Pop: 5,441 Mil 24: The Republic of Grand Canyon NP Pop: 5,477 Mil 25: The Republic of Grand Teton NP Pop: 5,470 Mil 26: The Republic of Great Basin NP Pop: 5,482 Mil 27: The Republic of Great Sand Dunes NP Pop: 5,493 Mil 28: The Republic of Great Smoky Mountains NP Pop: 5,478 Mil 29: The Republic of Guadalupe Mountains NP Pop: 5,430 Mil 30: The Republic of Haleakala NP Pop: 5,484 Mil 31: The Republic of Hawaii Volcanoes NP Pop: 5,476 Mil 32: The Republic of Hot Springs NP Pop: 5,476 Mil 33: The Republic of Indiana Dunes NP Pop: 5,493 Mil | 34: The Republic of Isle Royale NP Pop: 5,491 Mil 35: The Republic of Joshua Tree NP Pop: 5,470 Mil 36: The Republic of Katmai NP Pop: 5,449 Mil 37: The Republic of Kenai Fjords NP Pop: 5,474 Mil 38: The Republic of Kings Canyon NP Pop: 5,419 Mil 39: The Republic of Kobuk Valley NP Pop: 5,442 Mil 40: The Republic of Lake Clark NP Pop: 5,454 Mil 41: The Republic of Lassen Volcanic NP Pop: 5,474 Mil 42: The Republic of Mammoth Cave NP Pop: 5,421 Mil 43: The Republic of Mesa Verde NP Pop: 5,490 Mil 44: The Republic of Mount Rainier NP Pop: 5,503 Mil 45: The Republic of New River Gorge NP Pop: 5,442 Mil 46: The Republic of North Cascades NP Pop: 5,486 Mil 47: The Republic of Olympic NP Pop: 5,487 Mil 48: The Republic of Petrified Forest NP Pop: 5,429 Mil 49: The Republic of Pinnacles NP Pop: 5,456 Mil 50: The Republic of Redwood NP Pop: 5,465 Mil 51: The Republic of Rocky Mountain NP Pop: 5,451 Mil 52: The Republic of Saguaro NP Pop: 5,468 Mil 53: The Republic of Sequoia NP Pop: 5,486 Mil 54: The Republic of Shenandoah NP Pop: 5,438 Mil 55: The Republic of Theodore Roosevelt NP Pop: 5,442 Mil 56: The Republic of Virgin Islands NP Pop: 5,447 Mil 57: The Republic of Voyageurs NP Pop: 5,427 Mil 58: The Republic of White Sands NP Pop: 5,441 Mil 59: The Republic of Wind Cave NP Pop: 5,462 Mil 60: The Republic of Wrangell St Elias NP Pop: 5,444 Mil 61: The Republic of Yellowstone NP- Pop: 5,469 Mil 62: The Republic of Yosemite NP Pop: 5,437 Mil 63: The Republic of Zion NP Pop: 5,468 Mil |