1. Great Smoky Mountains National Park

11,388,893

2. Grand Canyon National Park

6,254,238

3. Zion National Park

4,504,812

4. Rocky Mountain National Park

4,437,215

5. Yosemite National Park

4,366,890

6. Yellowstone National Park

4,116,524

7. Acadia National Park

3,509,271

8. Olympic National Park

3,401,996

9. Grand Teton National Park

3,317,000

10. Glacier National Park

3,305,512

11. Joshua Tree National Park

2,853,619

12. Bryce Canyon National Park

2,571,684

13. Mount Rainier National Park

2,437,800

14. Cuyahoga Valley National Park

2,226,879

15. Hawaii Volcanoes National Park

2,016,702

16. Hot Springs National Park

1,561,616

17. Arches National Park

1,539,028

18. Shenandoah National Park

1,458,874

19. Death Valley National Park

1,294,827

20. Sequoia National Park

1,291,256

21. Capitol Reef National Park

1,150,165

22. Haleakala National Park

1,112,390

23. Badlands National Park

1,054,325

24. Everglades National Park

1,018,557

25. Saguaro Forest National Park

964,760

26. Canyonlands National Park

742,271

27. Crater Lake National Park

711,749

28. Theodore Roosevelt National Park

708,003

29. Kings Canyon National Park

692,932

30. Denali National Park

642,809

31. Petrified Forest National Park

627,757

32. Wind Cave National Park

619,924

33. Mesa Verde National Park

613,788

34. Mammoth Cave National Park

587,853

35. Glacier Bay National Park

547,057

36. Carlsbad Caverns National Park

520,026

37. Lassen Volcanic National Park

507,256

38. Great Sand Dunes National Park

486,935

39. Biscayne National Park

446,961

40. Redwood National Park

445,000

41. Big Bend National Park

440,276

42. Channel Islands National Park

383,687

43. Black Canyon of the Gunnison National Park

307,143

44. Virgin Islands National Park

304,408

45. Kenai Fjords National Park

303,598

46. Voyageurs National Park

237,250

47. Pinnacles National Park

233,334

48. Guadalupe Mountains National Park

225,257

49. Great Basin National Park

168,028

50. Congaree National Park

159,595

51. National Park of American Samoa

69,468

52. Wrangell-St. Elias National Park

68,292

53. Dry Tortugas National Park

54,281

54. Katmai National Park

37,818

55. North Cascades National Park

30,326

56. Isle Royale National Park

28,196

57. Lake Clark National Park

22,755

58. Kobuk Valley National Park

15,500

59. Gates of the Arctic National Park

11,177