| County | American Indian Percentage of Total Population |
| Ferry |  17 |
| Okanogan | 12 |
| Yakima | 6 |
| Stevens | 6 |
| Clallam | 5 |
| Grays Harbor | 5 |
| Mason | 4 |
| Adams | 4 |
| Pend Oreille | 4 |
| Whatcom | 3 |
| Klickitat | 3 |
| Pacific | 3 |
| Skagit | 3 |
| Jefferson | 2 |
| Lincoln | 2 |
| Douglas | 2 |
| Grant | 2 |
| Cowlitz | 2 |
| Lewis | 2 |
| Skamania | 2 |
| Kitsap | 2 |
| Spokane | 2 |
| Chelan | 2 |
| Thurston | 2 |
| Snohomish | 2 |
| Pierce | 2 |
| Wahkiakum | 2 |
| Asotin | 2 |
| Columbia | 2 |
| Franklin | 1 |
| Walla Walla | 1 |
| Benton | 1 |
| Kittitas | 1 |
| King | 1 |
| Clark | 1 |
| Island | 1 |
| San Juan | 1 |
| Whitman | 1 |
| Garfield | 0 |