Rivers with the largest drainage basin. The river with the largest drainage basin in United States is Mississippi–Missouri–Jefferson–Beaverhead–Red Rock–Hell Roaring with a basin area of 2,980,000 square kilometers.

Rivers with the highest average discharge. The river with the highest average discharge in United States is Mississippi–Missouri–Jefferson–Beaverhead–Red Rock–Hell Roaring with a discharge rate of 16,792 m³/s.

Here are the longest rivers in USA.

Mississippi–Missouri–Jefferson–Beaverhead–Red Rock–Hell Roaring.

Above the Mississippi River

Mississippi–Missouri–Jefferson–Beaverhead–Red Rock–Hell Roaring is the longest river in North America at 6,275 kilometers (3,899 miles).

At 6,275km (3,899 miles), the Mississippi–Missouri–Jefferson–Beaverhead–Red Rock–Hell Roaring river system is the longest in North America, helmed by the two longest rivers in the United States, the Missouri river (3,768 km) and the Mississippi River (3,544 km).The Missouri River is the longest river in North America. Originating from the Rocky Mountains of western Montana, the Missouri flows east and south for 2,341 miles (3,767 km) before merging into the Mississippi River. The Mississippi River has its sources at Lake Itasca and Brower's Spring in Montana, and stretches for another 3,544km southwards before flowing out eventually to the Gulf of Mexico.

The drainage area of the river spans 2,980,000 square kilometers and discharges at a rate of 16,792m³. The deepest part of the Mississippi River is in New Orleans, where its depth could reach 200 feet (61m).

Yukon.

Yukon River

Yukon is the 3^rd longest river in North America at 3,185 kilometers (1,979 miles).

Draining from an area as wide as 850,000 km² in United States (59.8% of river) and Canada (40.2%), Yukon has a length of 3,185 kilometers (1,979 miles).

Yukon discharges at 6,210 m³/3 and flows out into Bering Sea.

Compare Yukon with Upper Mississippi from North America.

Compare Yukon with Saint Lawrence–Great Lakes from North America.

Saint Lawrence–Great Lakes.

Saint Lawrence–Great Lakes

Saint Lawrence–Great Lakes is the 3^rd largest river by average discharge rate in North America at 10,100 m³/s.

Saint Lawrence–Great Lakes is a river that is 3,058 kilometers (or 1,900 miles) long and drains from a 1,030,000 km² drainage basin in Canada (52.1% of river) and United States (47.9%).

Its average discharge rate is 10,100 m³/3 and the river flows out into Gulf of Saint Lawrence.

Compare Saint Lawrence–Great Lakes with Colorado (western U.S.) from North America.

Compare Saint Lawrence–Great Lakes with Athabasca from North America.

Rio Grande.

Rio Grande

Draining from an area as wide as 570,000 km² in United States (52.1% of river) and Mexico (47.9%), Rio Grande has a length of 3,057 kilometers (1,900 miles).

Rio Grande discharges at 82 m³/3 and flows out into Gulf of Mexico.

Compare Rio Grande with Arkansas from North America.

Compare Rio Grande with Snake from North America.

Nelson–Saskatchewan.

Nelson–Saskatchewan

Nelson–Saskatchewan is the 3^rd largest river by drainage area in North America at 1,093,000 km².

Nelson–Saskatchewan is a 2,570-km long (1,597 miles) river that drains from a 1,093,000-km² wide basin in Canada and United States.

Nelson–Saskatchewan discharges at 2,575 m³/3 and flows out into Hudson Bay.

Compare Nelson–Saskatchewan with Lerma–Rio Grande De Santiago from North America.

Compare Nelson–Saskatchewan with Red (USA) from North America.

Arkansas.

Arkansas

Draining from an area as wide as 505,000 km² in United States, Arkansas has a length of 2,348 kilometers (1,459 miles).

Arkansas discharges at 1,066 m³/3 and flows out into Mississippi River.

Compare Arkansas with Colorado (western U.S.) from North America.

Compare Arkansas with Brazos from North America.

Colorado (western U.S.).

Colorado (western U.S.)

Colorado (western U.S.) is a river that stretches 2,333 kilometers (or 1,450 miles) in length, draining from a 390,000 km² basin in United States and Mexico.