The Most Visited USA National Parks - 2009

Rank Park Name Visitation
1 Great Smoky Mountains NP, TN,NC - 9,491,437
2 Grand Canyon NP, AZ - 4,348,068
3 Yosemite NP, CA - 3,737,472
4 Yellowstone NP, WY, MT, ID - 3,295,187
5 Olympic NP, WA - 3,276,459
6 Rocky Mountain NP, CO - 2,822,325
7 Zion NP, UT - 2,735,402
8 Cuyahoga Valley NP, OH - 2,589,288
9 Grand Teton NP, WY - 2,580,081
10 Acadia NP, ME - 2,227,698