Colorado drainage basins Table of major drainage basins Major Drainage Basins of the State of Colorado

| Basin | Outlet | Total_Area | In_State_Area | _In_State |
|---|---|---|---|---|
| Colorado River | Gulf of California | 001 703,132km 2 271,481mi 2 | 001 100,195km 2 38,686mi 2 | A064 14.2% |
| Arkansas River | Mississippi River | 002 478,501km 2 184,750mi 2 | 002 70,022km 2 27,036mi 2 | A063 14.6% |
| Rio Grande | Gulf of Mexico | 003 457,275km 2 176,555mi 2 | 009 12,070km 2 4,660mi 2 | A072 2.6% |
| Canadian River | Arkansas River | 004 122,701km 2 47,375mi 2 | 073 154km 2 59mi 2 | A073 0.1% |
| Green River | Colorado River | 005 115,903km 2 44,750mi 2 | 005 27,340km 2 10,556mi 2 | A059 23.6% |
| North Platte River | Platte River | 006 80,755km 2 31,180mi 2 | 018 5,129km 2 1,980mi 2 | A068 6.4% |