List of river systems by length facts for kids

The Nile River, seen from a boat in Egypt.

Have you ever wondered which rivers are the longest in the world? This article shares a list of the most amazing and longest rivers on Earth. These are all river systems that stretch for more than 1,000 kilometers (about 621 miles). Get ready to explore some incredible waterways!

Why Measuring Rivers is Tricky
List of River Systems Longer Than 1,000 km
Ancient Rivers: What Earth Looked Like Long Ago
See also

Why Measuring Rivers is Tricky

Measuring the exact length of a river is harder than you might think! Rivers are always changing. Their starting points (called the source) and ending points (called the mouth) can be hard to pinpoint.

Imagine a river that splits into many smaller streams, or flows through a big lake. How do you measure its length then? Also, rivers can change over time due to floods, erosion, or even human-made changes like dams.

For a long time, people thought the Nile was definitely the longest river. But some scientists now believe the Amazon might be longer! This is because they measure it in different ways, sometimes including nearby water channels. So, the "true" length can depend on how you measure it.

Because of all these reasons, the lengths you see for rivers are often close estimates. Scientists keep studying and measuring to get the best possible numbers!

List of River Systems Longer Than 1,000 km

For most rivers, different sources provide conflicting information on the length of a river system. The information in different sources is between parentheses.

Legend of colors used in main table, by continent
Continent color key
Africa	Asia	Australia	Europe	North America	South America

Rank	River	Length (km)	Length (miles)	Drainage area (km²)	Average discharge (m³/s)	Outflow	Countries in the drainage basin
1.	Nile–White Nile–Kagera–Nyabarongo–Mwogo–Rukarara	6,650 (7,088)	4,130 (4,404)	3,254,555	2,490	Mediterranean	Ethiopia, Eritrea, Sudan, Uganda, Tanzania, Kenya, Rwanda, Burundi, Egypt, Democratic Republic of the Congo, South Sudan
2.	Amazon–Ucayali–Tambo–Ene–Mantaro	6,400 (6,575)	3,976 (4,086)	7,000,000	230,000	Atlantic Ocean	Brazil, Peru, Bolivia, Colombia, Ecuador, Venezuela, Guyana
3.	Yangtze–Jinsha–Tongtian–Dangqu (Chang Jiang)	6,300 (6,418)	3,917 (3,988)	1,970,000	31,900	East China Sea	China
4.	Mississippi–Missouri–Jefferson–Beaverhead–Red Rock–Hell Roaring	6,275	3,902	3,248,000	21,300	Gulf of Mexico	United States (98.5%), Canada (1.5%)
5.	Yenisey–Angara–Selenga–Ider	5,539	3,445	2,580,000	20,200	Kara Sea	Russia (97%), Mongolia (2.9%)
6.	Yellow River (Huang He)	5,464	3,395	752,546	2,571	Bohai Sea	China
7.	Ob–Irtysh	5,410	3,364	2,990,000	13,100	Gulf of Ob	Russia, Kazakhstan, China, Mongolia
8.	Río de la Plata–Paraná–Rio Grande	4,880	3,030	3,182,064	27,225	Río de la Plata	Brazil (46.7%), Argentina (27.7%), Paraguay (13.5%), Bolivia (8.3%), Uruguay (3.8%)
9.	Congo–Lualaba-Luvua-Luapula-Chambeshi (Zaïre)	4,700	2,922	3,680,000	41,400	Atlantic Ocean	Democratic Republic of the Congo, Central African Republic, Angola, Republic of the Congo, Tanzania, Cameroon, Zambia, Burundi, Rwanda
10.	Amur–Argun (Heilong Jiang)	4,444	2,763	1,855,000	12,360	Sea of Okhotsk	Russia, China, Mongolia
11.	Lena	4,400	2,736	2,490,000	18,300	Laptev Sea	Russia
12.	Mekong (Lancang Jiang)	4,350	2,705	810,000	16,010	South China Sea	China, Myanmar, Laos, Thailand, Cambodia, Vietnam
13.	Mackenzie–Slave–Peace–Finlay	4,241	2,637	1,805,200	9,800	Beaufort Sea	Canada
14.	Niger	4,200	2,611	2,117,700	8,570	Gulf of Guinea	Nigeria (26.6%), Mali (25.6%), Niger (23.6%), Algeria (7.6%), Guinea (4.5%), Cameroon (4.2%), Burkina Faso (3.9%), Côte d'Ivoire, Benin, Chad
15.	Brahmaputra–Yarlung Tsangpo	3,969	2,466	712,035	27,000	Ganges	India (58.0%), China (19.7%), Nepal (9.0%), Bangladesh (6.6%), Disputed India/China (4.2%), Bhutan (2.4%)
16.	Murray–Darling–Culgoa–Balonne–Condamine	3,672	2,282	1,061,000	767	Southern Ocean	Australia
17.	Tocantins–Araguaia	3,650	2,270	950,000	17,600	Atlantic Ocean (Marajó Bay), Amazon Delta	Brazil
18.	Volga	3,645	2,266	1,380,000	8,380	Caspian Sea	Russia
19.	Shatt al-Arab–Euphrates–Murat	3,596	2,236	938,173	3,350	Persian Gulf	Iraq, Turkey, Syria, Iran
20.	Madeira–Mamoré–Grande–Caine–Rocha	3,380	2,100	1,485,200	31,200	Amazon	Brazil, Bolivia, Peru
21.	Purús	3,211	1,995	376,600	11,207	Amazon	Brazil, Peru
22.	Yukon	3,185	1,980	854,700	7,000	Bering Sea	United States (59.8%), Canada (40.2%)
23.	Indus–Sênggê Zangbo	3,180	1,976	1,081,718	5,533	Arabian Sea	Pakistan (93%), India and China
24.	São Francisco	3,180* (2,900)	1,976* (1,802)	610,000	3,300	Atlantic Ocean	Brazil
25.	Syr Darya–Naryn	3,078	1,913	219,000	703	Aral Sea	Kazakhstan, Kyrgyzstan, Uzbekistan, Tajikistan
26.	Salween (Nu Jiang)	3,060	1,901	324,000	6,700	Andaman Sea	China (52.4%), Myanmar (43.9%), Thailand (3.7%)
27.	Saint Lawrence–Niagara–Detroit–Saint Clair–Saint Marys–Saint Louis–North (Great Lakes)	3,058	1,900	1,030,000	12,500	Gulf of Saint Lawrence	Canada (52.1%), United States (47.9%)
28.	Rio Grande	3,057	1,900	570,000	82	Gulf of Mexico	United States (52.1%), Mexico (47.9%)
29.	Lower Tunguska	2,989	1,857	473,000	3,600	Yenisei	Russia
30.	Colorado-Green (western U.S.)	2,945	1,830	390,000	1,200	Gulf of California	United States, Mexico
31.	Danube–Breg (Donau, Dunăre, Duna, Dunav, Dunaj)	2,888*	1,795*	801,463	6,452	Black Sea	Romania (28.9%), Hungary (11.7%), Austria (10.3%), Serbia (10.3%), Germany (7.5%), Slovakia (5.8%), Bulgaria (5.2%), Croatia (4.5%), Ukraine (3.8%), Bosnia and Herzegovina, Moldova, Montenegro, Czech Republic, Switzerland, Slovenia
32.	Irrawaddy River–N'Mai River–Dulong River–Kelaoluo–Gada Qu	2,809*	1,745.8*	404,200*	15,112	Andaman Sea	China, Myanmar
33.	Zambezi (Zambesi)	2,740*	1,703*	1,330,000	4,880	Mozambique Channel	Zambia (41.6%), Angola (18.4%), Zimbabwe (15.6%), Mozambique (11.8%), Malawi (8.0%), Tanzania (2.0%), Namibia, Botswana
34.	Vilyuy	2,720	1,700	454,000	1,480	Lena	Russia
35.	Padma-Ganges-Alaknanda (Ganga)	2,704	1,690	1,024,000	16,000	Bay of Bengal	India, Bangladesh, Nepal
36.	Amu Darya–Panj	2,620	1,628	534,739	1,400	Aral Sea	Uzbekistan, Turkmenistan, Tajikistan, Afghanistan
37.	Japurá (Caquetá)	2,615*	1,625*	289,000	18,122	Amazon	Brazil, Colombia
38.	Nelson–Saskatchewan–South Saskatchewan–Bow	2,570	1,597	1,111,890	3,500	Hudson Bay	Canada, United States
39.	Paraguay (Rio Paraguay)	2,549	1,584	900,000	4,300	Paraná	Brazil, Paraguay, Bolivia, Argentina
40.	Kolyma	2,513	1,562	647,000	4,100	East Siberian Sea	Russia
41.	Pilcomayo	2,500	1,553	270,000	200	Paraguay	Paraguay, Argentina, Bolivia
42.	Upper Ob–Katun	2,490	1,547	1,040,000		Ob	Russia
43.	Ishim	2,450	1,522	177,000	56	Irtysh	Kazakhstan, Russia
44.	Orange	2,432	1,511	973,000	365	Atlantic Ocean	South Africa, Namibia, Botswana, Lesotho
45.	Ural	2,428	1,509	237,000	475	Caspian Sea	Russia, Kazakhstan
46.	Juruá	2,410	1,499	190,573	6,004	Amazon	Peru, Brazil
47.	Arkansas	2,348	1,459	505,000 (435,122)	1,066	Mississippi	United States
48.	Songhua	2,309	1,435	557,180	2,410	Amur	China
49.	Olenyok	2,292	1,424	219,000	1,210	Laptev Sea	Russia
50.	Dnieper	2,287	1,421	516,300	1,670	Black Sea	Ukraine, Belarus, Russia
51.	Aldan	2,273	1,412	729,000	5,501	Lena	Russia
52.	Ubangi–Uele	2,270	1,410	651,915	5,936	Congo	Democratic Republic of the Congo, Central African Republic, Republic of Congo
53.	Negro	2,250	1,398	720,114	34,573	Amazon	Brazil, Venezuela, Colombia
53.	Columbia-Snake	2,250	1,398	671,000	7,500	Pacific Ocean	Canada (30%), United States (70%)
55.	Tapajós-Teles Pires	2,210	1,290	494,254	13,540	Amazon	Brazil
56.	Pearl–Xi-Xun-Qian-Hongshui-Nanpan	2,200	1,376	437,000	10,700	South China Sea	China (98.5%), Vietnam (1.5%)
57.	Red (USA)	2,188	1,360	78,592	875	Mississippi	United States
58.	Kasai	2,153	1,338	880,200	10,000	Congo	Angola, Democratic Republic of the Congo
59.	Ohio–Allegheny	2,102	1,306	490,603	7,957	Mississippi	United States
60.	Orinoco	2,101	1,306	1,014,797	39,000	Atlantic Ocean	Venezuela, Colombia, Guyana
61.	Tarim	2,100	1,305	1,020,000		Lop Nur	China
61.	Xingu	2,100	1,305	520,292	10,023	Amazon	Brazil
63.	Jubba–Shebelle	2,064	1,282	749,000		Indian Ocean	Ethiopia, Somalia
64.	Brazos-Double Mountain Fork-North Fork-Blackwater Draw	2,060	1,280	116,000	237.5	Gulf of Mexico	United States
65.	Northern Salado	2,010	1,249	203,000		Paraná	Argentina
66.	Içá (Putumayo)	2,005	1,246	120,545	8,520	Amazon	Brazil, Peru, Colombia, Ecuador
67.	Vitim	1,978	1,229	225,000	1,937	Lena	Russia
68.	Chenab	1,974	675	160,000	977.3	Indus	India, Pakistan
69.	Tigris	1,950	1,212	375,000	1,014	Shatt al-Arab	Turkey, Iraq, Syria, Iran
70.	Don	1,870	1,162	425,600	935	Sea of Azov	Russia, Ukraine
71.	Stony Tunguska	1,865	1,159	240,000	1,750	Yenisey	Russia
72.	Pechora	1,809	1,124	312,041	4,823	Barents Sea	Russia
73.	Kama	1,805	1,122	507,000	4,100	Volga	Russia
74.	Limpopo	1,800	1,118	413,000	313.4	Indian Ocean	Mozambique, Zimbabwe, South Africa, Botswana
75.	Chulym	1,799	1,118	134,000		Ob	Russia
76.	Guaviare	1,760	1,090	151,607	7,529	Orinoco	Colombia
77	Marañón	1,737	1,079	364,873	16,708	Amazon	Peru
78.	Indigirka	1,726	1,072	360,400	1,810	East Siberian Sea	Russia
79.	Platte	1,690	1,050	219,900	199.3	Missouri	United States
80.	Senegal	1,641	1,020	419,659	680	Atlantic Ocean	Guinea, Senegal, Mali, Mauritania
81.	Khatanga–Kotuy	1,636	1,017	364,000	3,200	Laptev Sea	Russia
82.	Upper Jubba-Ganale Dorya	1,634	1,015	214,441	316	Jubba River	Ethiopia (69%), Somalia (27%), Kenya (5%)
83.	Uruguay	1,610	1,000	353,451	7,058	Atlantic Ocean	Uruguay, Argentina, Brazil
84.	Churchill	1,609	1,000	281,300	1,200	Hudson Bay	Canada
85.	Blue Nile	1,600	994	326,400	1,548	Nile	Ethiopia, Sudan
85.	Okavango (Cubango)	1,600	994	530,000	475	Okavango Delta	Namibia, Angola, Botswana
85.	Volta	1,600	994	407,093	1,210	Gulf of Guinea	Ghana, Burkina Faso, Togo, Côte d'Ivoire, Benin
88.	Beni	1,599	994	283,350	8,900	Madeira	Bolivia
89.	Shilka-Onon	1,592	989	206,000	440	Amur	Russia (86%), Mongolia (14%)
90.	Tobol	1,591	989	426,000	805	Irtysh	Kazakhstan, Russia
91.	Alazeya	1,590	988	64,700	320	East Siberian Sea	Russia
92.	Kafue	1,576	979	155,000	320	Zambezi	Zambia (99.6%), Democratic Republic of the Congo (0.4%)
93.	Yalong	1,571	976	128,444	1,810	Yangtze	China
94.	Magdalena	1,550	963	263,858	8,058	Caribbean Sea	Colombia
95.	Han	1,532	952	174,300	1,632	Yangtze	China
96.	Kura/Mt'k'vari	1,515	941	188,400	575	Caspian Sea	Turkey, Georgia, Azerbaijan
97.	Oka	1,500	932	245,000	1,310	Volga	Russia
97.	Upper Murray	1,500	932	260,000		Lower Murray	Australia
99.	Yana-Sartang	1,492	927	238,000	1,110	Laptev Sea	Russia
100.	Pecos	1,490	926	115,000	7.5	Rio Grande	United States
101.	Murrumbidgee River	1,485	923	84,917	120	Murray River	Australia
102.	Upper Yenisey–Little Yenisey (Kaa-Hem)	1,480	920	360,000		Yenisey	Russia, Mongolia
103.	Godavari	1,465	910	312,812	3,061	Bay of Bengal	India
104.	Sangha-Ngoko-Dja	1,459	907	233,740		Congo	Cameroon (45%), Republic of Congo (31%), Central African Republic (25%)
105.	Vaal	1,458	906	196,438	125	Orange	South Africa
106.	Sutlej	1,450	900	395,000	2,946.66	Chenab	China, India, Pakistan
107.	Ili (Yili)	1,439	870	140,000	480	Lake Balkhash	China, Kazakhstan
108.	Olyokma	1,436	892	210,000	2,110	Lena	Russia
109.	Upper Columbia	1,430	889	292,316	3,364	Columbia	United States, Canada
110.	Upper Tocantins	1,427	887	310,000		Tocantins	Brazil
111.	Belaya	1,420	882	142,000	858	Kama	Russia
111.	Cooper–Barcoo	1,420	880	297,950	36	Lake Eyre	Australia
113.	Dniester	1,411 (1,352)	877 (840)	72,100	310	Black Sea	Ukraine, Moldova
114.	Taz	1,401	871	150,000	1,450	Taz Estuary	Russia
115.	Benue	1,400	870	319,000	3,477	Niger	Cameroon, Nigeria
115.	Chari	1,400	870	548,747	1,059	Lake Chad	Chad, Cameroon, Niger, Nigeria
115.	Parnaíba	1,400	870	344,112		Atlantic Ocean	Brazil
115.	Warburton–Georgina	1,400	870	408,005	60	Lake Eyre	Australia
119.	Colorado (Texas)	1,387	862	103,000	73.9	Gulf of Mexico	United States
120.	Yamuna	1,376	855	366,223	2,950	Ganges	India
121.	Apaporis	1,370	851	57,430.6	4,092	Japurá	Colombia (93%), Brazil (7%),
121.	Nen (Nonni)	1,370	851	270,000		Songhua	China
121.	Vyatka	1,370	851	129,000	890	Kama	Russia
124.	Fraser	1,368	850	220,000	3,475	Pacific Ocean	Canada, United States
125.	Grande	1,360	845	143,000		Paraná	Brazil
126.	Kızıl River	1,355	734	115,000	400	Black Sea	Turkey
127.	Madre de Dios	1,347	837	125,000	4,915	Beni	Peru, Bolivia
128.	Liao-Xiliao-Laoha	1,345	836	232,000	500	Bohai Sea	China
129.	Lachlan River	1,339	832	84,700	49	Murrumbidgee River	Australia
130.	Narmada	1,333	828	98,796	1,447	Arabian Sea	India
131.	Hai	1,329	826	318,200	717	Bohai Sea	China
132.	Branco-Uraricoera	1,326	824	192,393	6,469	Rio Negro	Brazil (96%), Guyana (7%), Venezuela (1%)
133.	Iguaçu	1,320	820	67,537	1,746	Paraná	Brazil, Argentina
134.	Taseyeva-Chuna	1,319	820	128,000	740	Angara	Russia
135.	Javari	1,309	814	109,680	5,225	Amazon	Brazil (78%), Peru (22%)
136.	Northern Dvina–Sukhona	1,302	809	350,496	3,416	White Sea	Russia
137.	Inírida	1,300	808	53,816.9	3,385	Guaviare	Colombia
137.	Iriri	1,300	808	141,943	3,028	Xingu	Brazil
137.	Neva-Vuoksi	1,300	808	282,300	2,628	Gulf of Finland	Russia, Finland, Belarus
140.	Ruki	1,296	805	173,800	4,450	Congo	Democratic Republic of the Congo
141.	Krishna	1,290	800	258,948	2,213	Bay of Bengal	India
142.	Lomami	1,280	795	110,000		Congo	Democratic Republic of the Congo
143.	Ottawa	1,271	790	146,300	1,950	Saint Lawrence	Canada
144.	Rio Grande de Santiago-Lerma	1,270	789	119,543	320	Pacific Ocean	Mexico
145.	Guaporé (Itenez)	1,260	780	341,000	2,430	Mamoré	Brazil, Bolivia
146.	Red (Canada)-Assiniboine-Souris	1,260	780	287,500	244	Lake Winnipeg	Canada (56%), US (44%)
147.	Elbe–Vltava	1,252	778	148,268	711	North Sea	Germany, Czech Republic
148.	Zeya	1,242	772	233,000	1,810	Amur	Russia
149.	Juruena	1,240	771	192,628	4,936.7	Tapajós	Brazil
150.	Upper Mississippi	1,236	768	450,000	4,800	Mississippi	United States
151.	Rhine	1,233	768	185,000	2,330	North Sea	Germany (57.3%), Switzerland (15.1%), Netherlands (12.3%), France (12.2%), Luxembourg (1.4%), Austria (1.3%), Belgium (0.4%), Liechtenstein (0.1%), Italy (0.03%)
152.	Athabasca	1,231	765	95,300	783	Mackenzie	Canada
153.	Markha	1,231	765	99,000	405	Vilyuy	Russia
154.	Canadian	1,223	760	123,220	182.2	Arkansas	United States
155.	North Saskatchewan	1,220	758	122,800	238	Saskatchewan	Canada
156.	Kansas-Republican	1,218	757	155,690	205	Missouri	US
157.	Vistula–Narew-Bug	1,213	754	194,424	1,080	Baltic Sea	Poland, Belarus, Ukraine
158.	Awash	1,200	746	69,197	152	Lake Abbe	Ethiopia, Djibouti
158.	Shire	1,200	746	160,000	486	Zambezi	Mozambique, Malawi
158.	Ogooué (or Ogowe)	1,200	746	223,856	5,890	Atlantic Ocean	Gabon, Republic of the Congo
161.	Fimi-Lukenie	1,194	742	133,432		Kasai	Democratic Republic of the Congo
162.	Mobile	1,192	741	115,000	1,900	Gulf of Mexico	US
163.	Lukuga	1,184	736	244,500		Lualaba	Tanzania (62%), Democratic Republic of the Congo (26%), Zambia (6%), Burundi (5%), Rwanda (2%)
164.	Min-Dadu	1,182	734	133,000	2,850	Yangtze	China
165.	Markha	1,181	734	99,000	405	Vilyuy	Russia
166.	Aripuanã	1,175	730	147,224	4,064	Madeira	Brazil
167.	Milk	1,173	729	62,000	17.5	Missouri	United States, Canada
168.	Mun - Chi	1,162	722	119,180	725	Mekong River	Thailand
168.	White	1,162	722	71,910	834.8	Mississippi	United States
170.	Chindwin	1,158	720	114,685	4,740	Ayeyarwady	Myanmar
171.	Sankuru	1,150	715	150,000		Kasai	Democratic Republic of the Congo
171.	Wu	1,150	715	80,300	1,108	Yangtze	China
173.	Red (Asia)	1,149	714	143,700	4,300	Gulf of Tonkin	China, Vietnam
174.	James (Dakotas)	1,143	710	54,240	18.3	Missouri	United States
175.	Kapuas	1,143	710	98,749	6,012	South China Sea	Indonesia
176.	Paraíba do Sul	1,137	696	56,000		Atlantic Ocean	Brazil
177.	Yobe-Hadejia	1,135	705	183,009		Lake Chad	Nigeria (68%), Niger (32%)
178.	Desna	1,130	702	88,900	360	Dnieper	Russia, Belarus, Ukraine
178.	Helmand	1,130	702	150,000		Hamun-i-Helmand	Afghanistan, Iran
178.	Tietê	1,130	702	72,168	937	Paraná	Brazil
178.	Vychegda	1,130	702	121,000	1160	Northern Dvina	Russia
182.	Sepik	1,126	700	77,700	5,000	Pacific Ocean	Papua New Guinea, Indonesia
182.	Sobat-Pibor	1,126	700	225,000	412	White Nile	South Sudan (60%), Ethiopia (29%), Kenya (10%), Uganda (2%)
184.	Orkhon	1,124	698	132,835	66	Selenga	Mongolia
185.	Cimarron	1,123	698	49,100	32.9	Arkansas	United States
186.	Anadyr	1,120	696	191,000	2,020	Gulf of Anadyr	Russia
187.	Jialing River	1,119	695	160,000		Yangtze	China
188.	Liard	1,115	693	277,100	2,434	Mackenzie	Canada
189.	Omolon	1,114	692	113,000		Kolyma	Russia
190.	Mamberamo River	1,112	691	78,992	5,923	Pacific Ocean	Indonesia
191.	Cumberland	1,105	687	46,830	862	Mississippi	United States
192.	Omo	1,104	686	86,657	915.5	Lake Turkana	Ethiopia
193.	Bani	1,100	684	146,570		Niger	Mali (80%), Ivory Coast (15%), Burkina Faso (5%), Guinea (0.1%)
193.	Huallaga	1,100	684	90,000	3,800	Marañón	Peru
193.	Kwango	1,100	684	263,500	2,700	Kasai	Angola, Democratic Republic of the Congo
193.	Draa	1,100	684	95,000		Atlantic Ocean	Morocco
197.	Gambia	1,094	680	78,000		Atlantic Ocean	The Gambia, Senegal, Guinea
198.	Tyung	1,092	679	49,800		Vilyuy	Russia
199.	Barito River	1,090	680	81,675	5,497	Java Sea	Indonesia
200.	Maya	1,087	675	171,000	1,180	Aldan	Russia
201.	Yellowstone	1,080	671	114,260	390	Missouri	United States
201.	Ghaghara	1,080	671	127,950	2,990	Ganges	India, Nepal, China
203.	Huai River	1,078	670	270,000	1,110	Yangtze	China
204.	Aras	1,072	665	102,000	285	Kura	Turkey, Armenia, Azerbaijan, Iran
205.	Chu	1,067	663	62,500		none	Kyrgyzstan, Kazakhstan
205.	Sanaga-Djérem	1,067	663	140,000	2,072	Bight of Biafra	Cameroon, Nigeria, Central African Republic
207.	Seversky Donets	1,053 (1,078)	654 (670)	98,900	159	Don	Russia, Ukraine
208.	Bermejo	1,050	652	125,000		Paraguay	Argentina, Bolivia
208.	Cunene	1,050	652	108,943		Atlantic Ocean	Angola (85%), Namibia (15%)
208.	Fly	1,050	652	75,800	6,500	Gulf of Papua	Papua New Guinea, Indonesia
208.	Kuskokwim	1,050	652	120,000	1,900	Bering Sea	United States
212.	Tennessee	1,049	652	105,870	1,998	Ohio	United States
213.	Oder–Warta	1,045	649	118,861	550	Baltic Sea	Poland, Germany, Czech Republic
214.	Apure	1,038	645	167,000	2,300	Orinoco	Venezuela (99.8%), Colombia (0.2%)
215.	Logone	1,033	642	78,000	492	Chari	Chad (53%), Cameroon (34%), Central African Republic (14%)
216.	Aruwimi	1,030	640	116,100	2,200	Congo	Democratic Republic of the Congo
217.	Chambal	1,024	636	143,219	456	Yamuna	India
207.	Pur	1,024	636	112,000		Taz Estuary	Russia
219.	Daugava	1,020	634	87,900	678	Gulf of Riga	Latvia, Belarus, Russia
220.	Gila	1,015	631	151,000	7	Colorado (western U.S.)	United States
221.	Essequibo	1,014	630	156,828	5,136	Atlantic Ocean	Guyana, Venezuela
222.	Loire	1,012	629	115,271	840	Atlantic Ocean	France
223.	Khopyor	1,010	628	61,100	150	Don	Russia
224.	Tagus (Tajo/Tejo)	1,006	625	80,100	444	Atlantic Ocean	Spain, Portugal
225.	Flinders River	1,004	624	109,000	122	Gulf of Carpentaria	Australia
226.	Koksoak	1,000	621	136,262	2,800	Ungava Bay	Canada
226.	Usumacinta	1,000	621	134,400		Gulf of Mexico	Mexico, Guatemala

Ancient Rivers: What Earth Looked Like Long Ago

Did you know that rivers can change their paths and even disappear over millions of years? Scientists believe some truly massive rivers once flowed across our planet.

The Amazon-Congo Super River

Long, long ago, the land that is now South America and Africa were joined together in a supercontinent called Gondwanaland. Scientists think the Amazon basin in South America once flowed west towards the Pacific Ocean. But then, the mighty Andes mountains slowly pushed up, changing the river's direction to flow east.

It's also thought that the Congo in Africa might have once connected to the Amazon! If this was true, it would have formed an incredible river system about 10,000 kilometers (6,000 miles) long. This happened as the continents slowly drifted apart, a process called continental drift.

The West Siberian Ice Age River

During the last ice age, when huge sheets of ice covered much of the Earth, a giant river system might have flowed across Siberia. This river would have been around 10,000 kilometers (6,200 miles) long!

It would have started with the Selenga river in Mongolia and flowed through lakes blocked by ice, eventually reaching the Aral Sea, the Caspian Sea, and finally the Black Sea. Imagine a river that connected so many different seas!

The Lobourg River System in Europe

During the last big ice age, the southern part of what is now the North Sea was dry land. This area is known as Doggerland. Back then, several major European rivers like the Thames, the Meuse, the Scheldt, and the Rhine joined together.

This combined river system is called the Lobourg River. Scientists believe it flowed into a large lake near where the Straits of Dover are today, before emptying into the Atlantic Ocean. The Rhine part of this ancient river could have been nearly 1,650 kilometers (1,025 miles) long!