1: The Republic of Acadia NP Pop: 3,810 Mil 2: The Republic of American Samoa NP Pop: 3,834 Mil 3: The Republic of Arches NP Pop: 3,837 Mil 4: The Republic of Badlands NP Pop: 3,837 Mil 5: The Republic of Big Bend NP Pop: 3,848 Mil 6: The Republic of Biscayne NP Pop: 3,879 Mil 7: The Republic of Black Canyon of the Gunnison NP Pop: 3,836 Mil 8: The Republic of Bryce Canyon NP Pop: 3,820 Mil 9: The Republic of Canyonlands NP Pop: 3,849 Mil 10: The Republic of Capitol Reef NP Pop: 3,837 Mil 11: The Republic of Carlsbad Caverns NP Pop: 3,822 Mil 12: The Republic of Channel Islands NP Pop: 3,867 Mil 13: The Republic of Congaree NP Pop: 3,852 Mil 14: The Republic of Crater Lake NP Pop: 3,844 Mil 15: The Republic of Cuyahoga Valley NP Pop: 3,817 Mil 16: The Republic of Death Valley NP Pop: 3,842 Mil 17: The Republic of Denali NP Pop: 3,858 Mil 18: The Republic of Dry Tortugas NP Pop: 3,869 Mil 19: The Republic of Everglades NP Pop: 3,861 Mil 20: The Republic of Gates of the Arctic NP Pop: 3,860 Mil 21: The Republic of Gateway Arch NP Pop: 3,845 Mil 22: The Republic of Glacier Bay NP Pop: 3,822 Mil 23: The Republic of Glacier NP Pop: 3,796 Mil 24: The Republic of Grand Canyon NP Pop: 3,864 Mil 25: The Republic of Grand Teton NP Pop: 3,842 Mil 26: The Republic of Great Basin NP Pop: 3,847 Mil 27: The Republic of Great Sand Dunes NP Pop: 3,872 Mil 28: The Republic of Great Smoky Mountains NP Pop: 3,856 Mil 29: The Republic of Guadalupe Mountains NP Pop: 3,838 Mil 30: The Republic of Haleakala NP Pop: 3,861 Mil 31: The Republic of Hawaii Volcanoes NP Pop: 3,850 Mil 32: The Republic of Hot Springs NP Pop: 3,846 Mil 33: The Republic of Indiana Dunes NP Pop: 3,855 Mil | 34: The Republic of Isle Royale NP Pop: 3,876 Mil 35: The Republic of Joshua Tree NP Pop: 3,863 Mil 36: The Republic of Katmai NP Pop: 3,835 Mil 37: The Republic of Kenai Fjords NP Pop: 3,851 Mil 38: The Republic of Kings Canyon NP Pop: 3,816 Mil 39: The Republic of Kobuk Valley NP Pop: 3,821 Mil 40: The Republic of Lake Clark NP Pop: 3,829 Mil 41: The Republic of Lassen Volcanic NP Pop: 3,850 Mil 42: The Republic of Mammoth Cave NP Pop: 3,827 Mil 43: The Republic of Mesa Verde NP Pop: 3,866 Mil 44: The Republic of Mount Rainier NP Pop: 3,866 Mil 45: The Republic of New River Gorge NP Pop: 3,831 Mil 46: The Republic of North Cascades NP Pop: 3,856 Mil 47: The Republic of Olympic NP Pop: 3,863 Mil 48: The Republic of Petrified Forest NP Pop: 3,838 Mil 49: The Republic of Pinnacles NP Pop: 3,822 Mil 50: The Republic of Redwood NP Pop: 3,856 Mil 51: The Republic of Rocky Mountain NP Pop: 3,836 Mil 52: The Republic of Saguaro NP Pop: 3,845 Mil 53: The Republic of Sequoia NP Pop: 3,869 Mil 54: The Republic of Shenandoah NP Pop: 3,817 Mil 55: The Republic of Theodore Roosevelt NP Pop: 3,833 Mil 56: The Republic of Virgin Islands NP Pop: 3,842 Mil 57: The Republic of Voyageurs NP Pop: 3,819 Mil 58: The Republic of White Sands NP Pop: 3,830 Mil 59: The Republic of Wind Cave NP Pop: 3,863 Mil 60: The Republic of Wrangell St Elias NP Pop: 3,829 Mil 61: The Republic of Yellowstone NP- Pop: 3,850 Mil 62: The Republic of Yosemite NP Pop: 3,818 Mil 63: The Republic of Zion NP Pop: 3,866 Mil |