The 10 Largest Counties In The U.S.
10. Harney County, Oregon (10,226 square miles)
9. Inyo County, California (10,192 square miles)
8. Sweetwater County, Wyoming (10,491 square miles)
7. Lincoln County, Nevada (10,637 square miles)
6. Apache County, Arizona (11,218 square miles)
5. Mohave County, Arizona (13,461 square miles)
4. Elko County, Nevada (17,203 square miles)
3. Nye County, Nevada (18,159 Square miles)
2. Coconino County, Arizona (18,661 square miles)
1. San Bernardino County, California (20,105 square miles)