Thirty states have national parks, as do the territories of American Samoa and the U.S. Virgin Islands. The state with the most national parks is California with nine, followed by Alaska with eight, Utah with five, and Colorado with four.

Here is a alphabetical list of the 63 national parks in the United States along with their establishment dates:

1. Acadia National Park (Maine) – January 19, 1929
2. American Samoa National Park (American Samoa) – October 31, 1988
3. Arches National Park (Utah) – November 12, 1971
4. Badlands National Park (South Dakota) – November 10, 1978
5. Big Bend National Park (Texas) – June 12, 1944
6. Biscayne National Park (Florida) – June 28, 1980
7. Black Canyon of the Gunnison National Park (Colorado) – October 21, 1999
8. Bryce Canyon National Park (Utah) – February 25, 1928
9. Capitol Reef National Park (Utah) – December 18, 1971
10. Carlsbad Caverns National Park (New Mexico) – May 14, 1930
11. Channel Islands National Park (California) – March 5, 1980
12. Congaree National Park (South Carolina) – November 10, 2003
13. Crater Lake National Park (Oregon) – May 22, 1902
14. Cuyahoga Valley National Park (Ohio) – October 11, 2000
15. Death Valley National Park (California, Nevada) – October 31, 1994
16. Denali National Park and Preserve (Alaska) – February 26, 1917
17. Dry Tortugas National Park (Florida) – October 26, 1992
18. Everglades National Park (Florida) – December 6, 1947
19. Gates of the Arctic National Park and Preserve (Alaska) – December 2, 1980
20. Glacier Bay National Park and Preserve (Alaska) – December 2, 1980
21. Glacier National Park (Montana) – May 11, 1910
22. Grand Canyon National Park (Arizona) – February 26, 1919
23. Grand Teton National Park (Wyoming) – February 26, 1929
24. Great Basin National Park (Nevada) – October 27, 1986
25. Great Sand Dunes National Park and Preserve (Colorado) – September 13, 2004
26. Great Smoky Mountains National Park (North Carolina, Tennessee) – June 15, 1934
27. Guadalupe Mountains National Park (Texas) – September 30, 1972
28. Haleakalā National Park (Hawaii) – August 1, 1916
29. Hawaii Volcanoes National Park (Hawaii) – August 1, 1916
30. Hot Springs National Park (Arkansas) – March 4, 1921
31. Isle Royale National Park (Michigan) – April 3, 1940
32. Joshua Tree National Park (California) – October 31, 1994
33. Katmai National Park and Preserve (Alaska) – December 2, 1980
34. Kenai Fjords National Park (Alaska) – December 2, 1980
35. Kings Canyon National Park (California) – March 4, 1940
36. Kobuk Valley National Park (Alaska) – December 2, 1980
37. Lake Clark National Park and Preserve (Alaska) – December 2, 1980
38. Lassen Volcanic National Park (California) – August 9, 1916
39. Mammoth Cave National Park (Kentucky) – July 1, 1941
40. Mesa Verde National Park (Colorado) – June 29, 1906
41. Mount Rainier National Park (Washington) – March 2, 1899
42. North Cascades National Park (Washington) – October 2, 1968
43. Olympic National Park (Washington) – June 29, 1938
44. Petrified Forest National Park (Arizona) – December 9, 1962
45. Pinnacles National Park (California) – January 10, 2013
46. Redwood National and State Parks (California) – October 2, 1968
47. Rocky Mountain National Park (Colorado) – January 26, 1915
48. Saguaro National Park (Arizona) – October 14, 1994
49. Sequoia and Kings Canyon National Parks (California) – September 25, 1890
50. Shenandoah National Park (Virginia) – December 26, 1935
51. Theodore Roosevelt National Park (North Dakota) – November 10, 1978
52. Virgin Islands National Park (U.S. Virgin Islands) – August 2, 1956
53. Voyageurs National Park (Minnesota) – January 8, 1971
54. Wind Cave National Park (South Dakota) – January 9, 1903
55. Wrangell-St. Elias National Park and Preserve (Alaska) – December 2, 1980
56. Yellowstone National Park (Wyoming, Montana, Idaho) – March 1, 1872
57. Yosemite National Park (California) – October 1, 1890
58. Zion National Park (Utah) – November 19, 1919
59. Gateway Arch National Park (Missouri) – February 22, 2018
60. Indiana Dunes National Park (Indiana) – February 15, 2019
61. White Sands National Park (New Mexico) – December 20, 2019
62. New River Gorge National Park and Preserve (West Virginia) – December 27, 2020
63. Congaree National Park (South Carolina) – November 10, 2003

Sorted Oldest to Youngest:

Here is a list of all 63 national parks in the United States, sorted from the oldest to the newest based on their establishment dates:

1. Yellowstone National Park (Wyoming, Montana, Idaho) – March 1, 1872
2. Sequoia and Kings Canyon National Parks (California) – September 25, 1890
3. Yosemite National Park (California) – October 1, 1890
4. Mount Rainier National Park (Washington) – March 2, 1899
5. Crater Lake National Park (Oregon) – May 22, 1902
6. Wind Cave National Park (South Dakota) – January 9, 1903
7. Mesa Verde National Park (Colorado) – June 29, 1906
8. Glacier National Park (Montana) – May 11, 1910
9. Rocky Mountain National Park (Colorado) – January 26, 1915
10. Haleakalā National Park (Hawaii) – August 1, 1916
11. Lassen Volcanic National Park (California) – August 9, 1916
12. Zion National Park (Utah) – November 19, 1919
13. Grand Canyon National Park (Arizona) – February 26, 1919
14. Acadia National Park (Maine) – February 26, 1919
15. Grand Teton National Park (Wyoming) – February 26, 1929
16. Great Smoky Mountains National Park (North Carolina, Tennessee) – June 15, 1934
17. Everglades National Park (Florida) – May 30, 1934
18. Shenandoah National Park (Virginia) – December 26, 1935
19. Olympic National Park (Washington) – June 29, 1938
20. Petrified Forest National Park (Arizona) – December 9, 1962
21. Hot Springs National Park (Arkansas) – March 4, 1921
22. Carlsbad Caverns National Park (New Mexico) – May 14, 1930
23. Great Basin National Park (Nevada) – October 27, 1986
24. Theodore Roosevelt National Park (North Dakota) – November 10, 1978
25. Virgin Islands National Park (U.S. Virgin Islands) – August 2, 1956
26. Capitol Reef National Park (Utah) – December 18, 1971
27. North Cascades National Park (Washington) – October 2, 1968
28. Redwood National and State Parks (California) – October 2, 1968
29. Channel Islands National Park (California) – March 5, 1980
30. Guadalupe Mountains National Park (Texas) – September 30, 1972
31. Mammoth Cave National Park (Kentucky) – July 1, 1941
32. Isle Royale National Park (Michigan) – April 3, 1940
33. Biscayne National Park (Florida) – June 28, 1980
34. Dry Tortugas National Park (Florida) – October 26, 1992
35. Gates of the Arctic National Park and Preserve (Alaska) – December 2, 1980
36. Katmai National Park and Preserve (Alaska) – December 2, 1980
37. Kenai Fjords National Park (Alaska) – December 2, 1980
38. Kobuk Valley National Park (Alaska) – December 2, 1980
39. Lake Clark National Park and Preserve (Alaska) – December 2, 1980
40. Wrangell-St. Elias National Park and Preserve (Alaska) – December 2, 1980
41. Pinnacles National Park (California) – January 10, 2013
42. Great Sand Dunes National Park and Preserve (Colorado) – September 13, 2004
43. Black Canyon of the Gunnison National Park (Colorado) – October 21, 1999
44. Cuyahoga Valley National Park (Ohio) – October 11, 2000
45. Shenandoah National Park (Virginia) – May 22, 1926
46. Arches National Park (Utah) – November 12, 1971
47. Capitol Reef National Park (Utah) – December 18, 1971
48. Canyonlands National Park (Utah) – September 12, 1964
49. Badlands National Park (South Dakota) – November 10, 1978
50. Theodore Roosevelt National Park (North Dakota) – November 10, 1978
51. Shenandoah National Park (Virginia) – May 22, 1926
52. Virgin Islands National Park (U.S. Virgin Islands) – August 2, 1956
53. Voyageurs National Park (Minnesota) – January 8, 1971
54. Great Smoky Mountains National Park (North Carolina, Tennessee) – June 15, 1934
55. Theodore Roosevelt National Park (North Dakota) – November 10, 1978
56. Gateway Arch National Park (Missouri) – February 22, 2018
57. Indiana Dunes National Park (Indiana) – February 15, 2019
58. White Sands National Park (New Mexico) – December 20, 2019
59. New River Gorge National Park and Preserve (West Virginia) – December 27, 2020
60. Congaree National Park (South Carolina) – November 10, 2003
61. Great Sand Dunes National Park and Preserve (Colorado) – September 13, 2004
62. Congaree National Park (South Carolina) – November 10, 2003
63. Congaree National Park (South Carolina) – November 10, 2003

Please note that some dates may represent the establishment of the national park, while others may represent the establishment of the national park and preserve. Additionally, specific designations within national parks and preserves may have different establishment dates. Always verify this information from official sources for the most accurate and up-to-date details.