10 Most Visited National Parks (2014)
1. Great Smoky Mountains National Park – 10,099,276
2. Grand Canyon National Park – 4,756,771
3. Yosemite National Park – 3,882,642
4. Yellowstone National Park – 3,513,484
5. Rocky Mountain National Park – 3,434,751
6. Olympic National Park – 3,243,872
7. Zion National Park – 3,189,696
8. Grand Teton National Park – 2,791,392
9. Acadia National Park – 2,563,129
10. Glacier National Park – 2,338,528