|
River |
Length |
Drainage area |
Average discharge (m³/s) |
Mouth |
Notes |
Reference |
Rank |
|---|
|
Amazon River |
6,937 km (4,310 mi)
6,992 km (4,345 mi) |
7,050,000 km2 (2,720,000 sq mi) |
219,000 m3/s (7,700,000 cu ft/s) |
Atlantic Ocean |
Second-longest and largest river in the world, undammed as well as unbridged, does not form a delta while joining the sea due to adequate thrust of river water to overcome the sea water wave and tidal thrusts. |
|
1 |
|
Lena River |
4,472 km (2,779 mi) |
2,500,000 km2 (970,000 sq mi) |
17,000 m3/s (600,000 cu ft/s) |
Arctic Ocean |
Longest undammed river in Asia. |
|
2 |
|
Amur–Shilka–Onon |
4,197 km (2,608 mi) |
1,855,000 km2 (716,000 sq mi) |
11,700 m3/s (410,000 cu ft/s) |
Strait of Tartary |
|
|
3 |
|
Amu Darya–Panj |
3,525 mi (5,673 km) |
534,700 km2 (206,400 sq mi) |
2,530 m3/s (89,000 cu ft/s) |
Aral Sea (former) |
Although undammed, heavy diversion through canals causes the river to frequently dry up without reaching its mouth. Tajikistan is planning to build a hydroelectric dam on the Panj River. |
|
4 |
|
Mackenzie–Slave–Athabasca |
3,403 km (2,115 mi) |
1,805,200 km2 (697,000 sq mi) |
10,700 m3/s (380,000 cu ft/s) |
Arctic Ocean |
The Peace–Finlay system would extend even longer from the head of the Slave but there are dams on the Peace. |
|
5 |
|
Nizhnyaya Tunguska River |
2,989 km (1,857 mi) |
473,000 km2 (183,000 sq mi) |
3,680 m3/s (130,000 cu ft/s) |
Yenisei River |
The Russian government is planning to build hydro dams on the river within the next few years. |
|
|
|
Salween River |
2,815 km (1,749 mi) |
324,000 km2 (125,000 sq mi) |
4,876 m3/s (172,200 cu ft/s) |
Andaman Sea |
Longest undammed Southeast Asian river. Burma is planning to build the TaSang Dam and several others. |
|
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|
Paraguay River |
2,549 km (1,584 mi) |
365,592 km2 (141,156 sq mi) |
2,700 m3/s (95,000 cu ft/s) |
Paraná River |
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Aldan River |
2,273 km (1,412 mi) |
729,000 km2 (281,000 sq mi) |
5,060 m3/s (179,000 cu ft/s) |
Lena River |
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Rio Negro |
2,230 km (1,390 mi) |
691,000 km2 (267,000 sq mi) |
29,300 m3/s (1,030,000 cu ft/s) |
Amazon River |
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Vitim River |
1,978 km (1,229 mi) |
|
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Lena River |
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Indigirka River |
1,726 km (1,072 mi) |
360,400 km2 (139,200 sq mi) |
1,810 m3/s (64,000 cu ft/s) |
Arctic Ocean |
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Fraser River |
1,375 km (854 mi) |
220,000 km2 (85,000 sq mi) |
3,475 m3/s (122,700 cu ft/s) |
Pacific Ocean |
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Kuskokwim River |
1,165 km (724 mi) |
120,000 km2 (46,000 sq mi) |
1,900 m3/s (67,000 cu ft/s) |
Bering Sea |
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Back River |
1,150 km (710 mi) |
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Arctic Ocean |
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Anadyr River |
1,150 km (710 mi) |
191,000 km2 (74,000 sq mi) |
1,000 m3/s (35,000 cu ft/s) |
Gulf of Anadyr |
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Liard River |
1,115 km (693 mi) |
277,100 km2 (107,000 sq mi) |
2,434 m3/s (86,000 cu ft/s) |
Mackenzie River |
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Yellowstone River |
1,114 km (692 mi) |
181,300 km2 (70,000 sq mi) |
380 m3/s (13,000 cu ft/s) |
Missouri River |
Longest undammed river in the contiguous United States. |
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Maya River |
1,053 km (654 mi) |
171,000 km2 (66,000 sq mi) |
1,180 m3/s (42,000 cu ft/s) |
Aldan River |
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Fly River |
1,050 km (650 mi) |
76,000 km2 (29,000 sq mi) |
6,000 m3/s (210,000 cu ft/s) |
Gulf of Papua |
Largest completely undammed river system in the world |
|
|
White River |
934 km (580 mi) |
26,000 km2 (10,000 sq mi) |
16 m3/s (570 cu ft/s) |
Missouri River |
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Tanana River |
916 km (569 mi) |
113,960 km2 (44,000 sq mi) |
1,172 m3/s (41,400 cu ft/s) |
Yukon River |
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Thelon River |
900 km (560 mi) |
142,400 km2 (55,000 sq mi) |
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Hudson Bay |
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Stikine River |
610 km (380 mi) |
52,000 km2 (20,000 sq mi) |
1,580 m3/s (56,000 cu ft/s) |
Pacific Ocean |
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Skeena River |
570 km (350 mi) |
54,400 km2 (21,000 sq mi) |
1,760 m3/s (62,000 cu ft/s) |
Pacific Ocean |
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Susitna River |
504 km (313 mi) |
52,000 km2 (20,000 sq mi) |
1,400 m3/s (49,000 cu ft/s) |
Pacific Ocean |
Alaska is planning to build a hydroelectric dam on the river at Devil's Canyon. |
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