Rank
|
River
|
Basin countries
|
Length of longest channel
|
Drainage area
|
Average discharge (m³/s)
|
Average annual discharge
|
Mouth
|
Notes
|
1
|
Fly River
|
Papua New Guinea Indonesia
|
1,050 kilometres (650 mi)
|
76,000 square kilometres (29,000 sq mi)
|
6,000 cubic metres per second (210,000 cu ft/s)
|
189 cubic kilometres (45 cu mi)
|
Gulf of Papua
|
Largest river with no dam in its catchment
|
2
|
Mamberamo River
|
Indonesia
|
|
|
4,580 cubic metres per second (162,000 cu ft/s)
|
144.5 cubic kilometres (34.7 cu mi)
|
Pacific Ocean
|
Largest river in all of Indonesia
|
3
|
Pechora River
|
Russia
|
1,809 kilometres (1,124 mi)
|
322,000 square kilometres (124,000 sq mi)
|
4,100 cubic metres per second (140,000 cu ft/s)
|
129 cubic kilometres (31 cu mi)
|
Arctic Ocean
|
Once the subject of a possible transfer of water into the Volga.
|
4
|
Sepik River
|
Papua New Guinea Indonesia
|
1,126 kilometres (700 mi)
|
80,321 square kilometres (31,012 sq mi)
|
3,804 cubic metres per second (134,300 cu ft/s)
|
120 cubic kilometres (29 cu mi)
|
Pacific Ocean
|
Often regarded as largest completely pristine river system in the world
|
5
|
Kaladan River
|
Burma India
|
350 kilometres (220 mi)
|
30,500 square kilometres (11,800 sq mi)[2] |
3,476 cubic metres per second (122,800 cu ft/s)
|
110 cubic kilometres (26 cu mi)
|
Bay of Bengal
|
Discharge estimated in absence of streamgauges. Dredging project by Indian and Myanmar governments.
|
6
|
Kikori River
|
Papua New Guinea
|
320 kilometres (200 mi)
|
23,300 square kilometres (9,000 sq mi)
|
3,274 cubic metres per second (115,600 cu ft/s)
|
103 cubic kilometres (25 cu mi)
|
Gulf of Papua
|
|
7
|
Khatanga River
|
Russia (Krasnoyarsk Krai)
|
1,150 kilometres (710 mi)
|
364,000 square kilometres (141,000 sq mi)
|
3,200 cubic metres per second (110,000 cu ft/s)
|
101 cubic kilometres (24 cu mi)
|
Arctic Ocean
|
Most northerly large river system in the world, with northernmost tree line in basin.
|
8
|
Purari River
|
Papua New Guinea
|
470 kilometres (290 mi)
|
33,670 square kilometres (13,000 sq mi)
|
2,571 cubic metres per second (90,800 cu ft/s)
|
81 cubic kilometres (19 cu mi)
|
Gulf of Papua
|
Hydroelectric dam proposed by Queensland government, so may need to be removed from list[3] |
9
|
Atrato River
|
Colombia
|
750 kilometres (470 mi)
|
38,600 square kilometres (14,900 sq mi)
|
2,274 cubic metres per second (80,300 cu ft/s)
|
71 cubic kilometres (17 cu mi)
|
Pacific Ocean
|
Some estimates place discharge much higher – possibly placing the Atrato second only to the Fly[4] |
10
|
Pyasina River
|
Russia (Krasnoyarsk Krai)
|
818 kilometres (508 mi)
|
182,000 square kilometres (70,000 sq mi)
|
2,260 cubic metres per second (80,000 cu ft/s)
|
71 cubic kilometres (17 cu mi)
|
Arctic Ocean
|
Norilsk, most northerly city over 100,000, located on main stem of river.
|
11
|
Essequibo River
|
Guyana Venezuela
|
1,000 kilometres (620 mi)[5] |
69,000 square kilometres (27,000 sq mi)
|
2,213 cubic metres per second (78,200 cu ft/s)
|
70 cubic kilometres (17 cu mi)
|
Caribbean Sea
|
Largest completely unfragmented river flowing into Atlantic.
|
12
|
Anadyr River
|
Russia
|
1,150 kilometres (710 mi)
|
191,000 square kilometres (74,000 sq mi)
|
2,020 cubic metres per second (71,000 cu ft/s)
|
64 cubic kilometres (15 cu mi)
|
Gulf of Anadyr
|
|
13
|
Kuskokwim River
|
Alaska (United States)
|
1,165 kilometres (724 mi)
|
120,000 square kilometres (46,000 sq mi)
|
1,900 cubic metres per second (67,000 cu ft/s)
|
60 cubic kilometres (14 cu mi)
|
Bering Sea
|
Largest unfragmented river in North America. Small dams exist on tributaries of Yukon, with which it shares a major delta.
|
14
|
Indigirka River
|
Russia (Sakha)
|
1,726 kilometres (1,072 mi)
|
360,400 square kilometres (139,200 sq mi)
|
1,810 cubic metres per second (64,000 cu ft/s)
|
57 cubic kilometres (14 cu mi)
|
Arctic Ocean
|
Oymyakon, often thought of as the Northern Pole of Cold, located on main stem of river.
|
15
|
Great Tenasserim River
|
Burma
|
300 kilometres (190 mi)
|
|
1,788 cubic metres per second (63,100 cu ft/s)
|
56 cubic kilometres (13 cu mi)
|
Andaman Sea
|
Discharge estimated in absence of streamgauges.
|
16
|
Copper River
|
Alaska (United States)
|
460 kilometres (290 mi)
|
63,000 square kilometres (24,000 sq mi)
|
1,700 cubic metres per second (60,000 cu ft/s)
|
54 cubic kilometres (13 cu mi)
|
Pacific Ocean
|
|
17
|
Laluai River
|
Papua New Guinea (New Britain)
|
|
|
1,612 cubic metres per second (56,900 cu ft/s)
|
51 cubic kilometres (12 cu mi)
|
Pacific Ocean
|
Hydropower dams proposed at present,[6] so may not remain on list permanently
|
18
|
Stikine River
|
Canada Alaska (United States)
|
539 kilometres (335 mi)
|
52,000 square kilometres (20,000 sq mi)
|
1,600 cubic metres per second (57,000 cu ft/s)
|
51 cubic kilometres (12 cu mi)
|
Pacific Ocean
|
|
19
|
Taz River
|
Russia
|
1,401 kilometres (871 mi)
|
150,000 square kilometres (58,000 sq mi)
|
1,540 cubic metres per second (54,000 cu ft/s)
|
49 cubic kilometres (12 cu mi)
|
Kara Sea
|
|
20
|
Courantyne River
|
Suriname Guyana
|
765 kilometres (475 mi)
|
69,000 square kilometres (27,000 sq mi)
|
1,500 cubic metres per second (53,000 cu ft/s)
|
47 cubic kilometres (11 cu mi)
|
Atlantic Ocean
|
|
21
|
Susitna River
|
Alaska (United States)
|
504 kilometres (313 mi)
|
63,400 square kilometres (24,500 sq mi)
|
1,400 cubic metres per second (49,000 cu ft/s)
|
44 cubic kilometres (11 cu mi)
|
Pacific Ocean
|
Hydropower dams proposed at present, so may not remain on list indefinitely[7] |
22
|
Thelon River
|
Canada (Nunavut)
|
900 kilometres (560 mi)
|
239,332 square kilometres (92,407 sq mi)
|
1,380 cubic metres per second (49,000 cu ft/s)
|
44 cubic kilometres (11 cu mi)
|
Chesterfield Inlet
|
|
23
|
Chari River
|
Chad Cameroon Central African Republic
|
949 kilometres (590 mi)
|
548,747 square kilometres (211,872 sq mi)
|
1,200 cubic metres per second (42,000 cu ft/s)
|
38 cubic kilometres (9.1 cu mi)
|
Lake Chad
|
Only dryland river with discharge over 10 cubic kilometres (2.40 cu mi) not affected by dams.
|
24
|
Olenyok River
|
Russia (Sakha)
|
2,270 kilometres (1,410 mi)[8] |
219,300 square kilometres (84,700 sq mi)[8] |
1,090 cubic metres per second (38,000 cu ft/s)
|
35 cubic kilometres (8.4 cu mi)
|
Arctic Ocean
|
|
25
|
Kamchatka River
|
Russia
|
758 kilometres (471 mi)
|
56,300 square kilometres (21,700 sq mi)
|
1,050 cubic metres per second (37,000 cu ft/s)
|
33 cubic kilometres (7.9 cu mi)
|
Pacific Ocean
|
|
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