U.S. River Basins
Contiguous U.S. Major River Basins as designated by the U.S. Water Resources Council)
- Pacific Northwest Basin
- California River Basin
- Great Basin
- Lower Colorado River Basin
- Upper Colorado River Basin
- Rio Grande River Basin
- Texas Gulf Coast Basin
- Arkansas-White-Red Basin
- Lower Mississippi River Basin
- Missouri River Basin
- Souris-Red-Rainy Basin
- Upper Mississippi River Basin
- Great Lakes Basin
- Tennessee River Basin
- Ohio River Basin
- South Atlantic-Gulf Basin
- Mid-Atlantic Basin
- New England Basin
