Region
United States
163
Mexican-American Border Region
6
North America
6
Great Lakes Watershed (North America)
4
Saint Lawrence River Watershed
4
Capitan Grande Indian Reservation (Calif.)
2
Creek Nation
2
Crow Indian Reservation (Mont.)
2
Florida
2
Great Lakes Watershed
2
Indian Territory
2
La Jolla Reservation (Calif.)
2
La Pointe (Wis.)
2
Oklahoma
2
Southwestern States
2
Warm Springs Indian Reservation (Or.)
2
West (U.S.)
2
États-Unis
1
Grands Lacs, Bassin des (Amérique du Nord)
1
Saint-Laurent, Bassin du
1
Washington (D.C.)
1