# Rhestr afonydd hwyaf y byd

|  |  |
| --- | --- |
|  |  |
|

| Cyfandiroedd
 |
| --- |
| Affrica
 | Asia
 | Awstralia
 | Ewrop
 | Gogledd America
 | De America
 |

 |

---

|  | Afon
 | Hyd (km)
 | Dalgylch (km²)
 | Llif cyfartaledd (m³/eiliad)
 | Yn llifo i
 | Gwledydd yn y dalgylch
 |
| --- | --- | --- | --- | --- | --- | --- |
| 1.
 | Afon Amazonas \*
 | 7040
 | 6915000
 | 219000
 | Cefnfor Iwerydd
 | Brasil, Periw, Bolifia, Colombia, Ecwador, Feneswela.
 |
| 2.
 | Nîl \*
 | 6671
 | 3400000
 | 5100
 | Y Môr Canoldir
 | Ethiopia, Eritrea, Swdan, Wganda, Tansanïa, Cenia, Rwanda, Bwrwndi, Yr Aifft, Gweriniaeth Ddemocrataidd y Congo.
 |
| 3.
 | Mississippi - Missouri - Jefferson
 | 6270 (6420)
 | 2980000
 | 16200
 | Gwlff Mecsico
 | Unol Daleithiau America, Canada
 |
| 4.
 | Yangtze (Chang Jiang) | 6211 (5797)
 | 1800000
 | 31900
 | Môr Dwyrain China
 | Gweriniaeth Pobl Tsieina
 |
| 5.
 | Yenisei - Angara - Selenga
 | 5550 (4506)
 | 2580000
 | 19600
 | Môr Kara
 | Rwsia, Mongolia
 |
| 6.
 | Huang He (Yr Afon Felen) | 5464 (4667)
 | 745000
 | 2571
 | Môr Bohai (Balhae) | Gweriniaeth Pobl Tsieina
 |
| 7.
 | Ob' - Irtysh
 | 5410\*
 | 2990000
 | 12800
 | Gwlff Ob
 | Rwsia, Casachstan, Gweriniaeth Pobl Tsieina
 |
| 8.
 | Amur (Heilong Jiang) | 4368\*
 | 1855000
 | 11400
 | Môr Okhotsk
 | Rwsia, Gweriniaeth Pobl Tsieina, Mongolia
 |
| 9.
 | Congo (Zaire) | 4371 (4670)
 | 3680000
 | 41800
 | Cefnfor Iwerydd
 | Gweriniaeth Ddemocrataidd y Congo, Gweriniaeth Canolbarth Affrica, Angola, Gweriniaeth y Congo, Tansanïa, Camerŵn, Sambia, Bwrwndi, Rwanda
 |
| 10.
 | Lena
 | 4260 (4400)
 | 2490000
 | 17100
 | Môr Laptev
 | Rwsia
 |
| 11.
 | Mackenzie - Peace - Finlay
 | 4241 (5427)
 | 1790000
 | 10300
 | Môr Beaufort
 | Canada
 |
| 12.
 | Niger
 | 4167 (4138\*)
 | 2090000
 | 9570
 | Gwlff Gini
 | Nigeria, Mali, Niger, Algeria, Gini, Camerŵn, Bwrcina Ffaso, Arfordir Ifori, Benin, Tsiad
 |
| 13.
 | Mekong (Lancang Jiang) | 4023
 | 810000
 | 16000
 | Môr De China
 | Laos, Gwlad Tai, Gweriniaeth Pobl Tsieina, Cambodia, Fietnam, Myanmar
 |
| 14.
 | Paraná (Río de la Plata) | 3998 (4700)
 | 3100000
 | 25700
 | Cefnfor Iwerydd
 | Brasil, Ariannin, Paragwái, Bolifia, Wrwgwái
 |
| 15.
 | Murray - Darling
 | 3750 (3520)
 | 1061000
 | 767
 | Cefnfor y De
 | Awstralia
 |
| 16.
 | Volga
 | 3645\*
 | 1380000
 | 8080
 | Môr Caspia
 | Rwsia
 |
| 17.
 | Shatt al-'Arab / Arvandrud - Ewffrates
 | 3596 (2992)
 | 884000
 | 856
 | Gwlff Persia
 | Irac, Twrci, Iran, Syria
 |
| 18.
 | Purus
 | 3379 (2948) (3210)
 | 63166
 | 8400
 | Afon Amazonas
 | Brasil, Periw
 |
| 19.
 | Madeira - Mamoré
 | 3239
 | 850000
 | 17000
 | Afon Amazonas
 | Brasil, Bolifia, Periw
 |
| 20.
 | Yukon
 | 3184
 | 850000
 | 6210
 | Môr Bering
 | Unol Daleithiau America, Canada
 |
| 21.
 | Indus (Sindhu) | 3180
 | 960000
 | 7160
 | Môr Arabia
 | Pacistan, India, Gweriniaeth Pobl Tsieina, Affganistan
 |
| 22.
 | São Francisco
 | 3180\* (2900)
 | 610000
 | 3300
 | Cefnfor Iwerydd
 | Brasil
 |
| 23.
 | Syr Darya - Naryn
 | 3078
 | 219000
 | 703
 | Môr Aral
 | Casachstan, Cirgistan, Wsbecistan, Tajicistan
 |
| 24.
 | Salawin (Nu Jiang) | 3060
 | 324000
 | 3153
 | Môr Andaman
 | Gweriniaeth Pobl Tsieina, Myanmar, Gwlad Tai
 |
| 25.
 | St Lawrence - Llynnoedd Mawr
 | 3058
 | 1030000
 | 10100
 | Gwlff St Lawrence
 | Canada, Unol Daleithiau America
 |
| 26.
 | Rio Grande
 | 3057 (2896)
 | 570000
 | 82
 | Gwlff Mecsico
 | Unol Daleithiau America, Mecsico
 |
| 27.
 | Tunguska Isaf
 | 2989
 | 473000
 | 3600
 | Yenisei
 | Rwsia
 |
| 28.
 | Brahmaputra
 | 2948\*
 | 1730000
 | 19200
 | Bae Bengal
 | India, Gweriniaeth Pobl Tsieina, Nepal, Bangladesh, Bhwtan
 |
| 29.
 | Donaw
 | 2850\*
 | 817000
 | 7130
 | Y Môr Du
 | Yr Almaen, Awstria, Slofacia, Hwngari, Croatia, Serbia, Bwlgaria, Rwmania, Moldafa, Wcráin
 |
| 30.
 | Afon Ewffrates
 | 2760
 | 765831
 | 818
 | Gwlff Persia
 | Twrci, Syria, Irac
 |
| 31.
 | Tocantins
 | 2699
 | 1400000
 | 13598
 | Cefnfor Iwerydd, Afon Amazonas
 | Brasil
 |
| 32.
 | Zambezi (Zambesi) | 2693\*
 | 1330000
 | 4880
 | Culfor Mosambîc
 | Sambia, Angola, Simbabwe, Mosambic, Malawi, Tansanïa, Namibia, Botswana
 |
| 33.
 | Viljuj
 | 2650
 | 454000
 | 1480
 | Lena
 | Rwsia
 |
| 34.
 | Araguaia
 | 2627
 | 358125
 | 6172
 | Tocantins
 | Brasil
 |
| 35.
 | Amu Darya
 | 2620
 | 534739
 | 1400
 | Môr Aral
 | Wsbecistan, Tyrcmenistan, Tajicistan, Affganistan
 |
| 36.
 | Caquetá (Rio Yapurá neu Japurá) | 2615\*
 | 242259
 | 6000
 | Afon Amazonas
 | Brasil, Colombia
 |
| 37.
 | Nelson - Saskatchewan
 | 2570
 | 1093000
 | 2575
 | Bae Hudson
 | Canada
 |
| 38.
 | Paragwái (Rio Paraguay) | 2549
 | 900000
 | 4300
 | Paraná
 | Brasil, Paragwái, Bolifia, Ariannin
 |
| 39.
 | Kolyma
 | 2513
 | 644000
 | 3800
 | Môr Siberia Dwyreiniol
 | Rwsia
 |
| 40.
 | Ganga
 | 2510
 | 907000
 | 12037
 | Brahmaputra, Bae Bengal
 | India, Bangladesh, Nepal
 |
| 41.
 | Pilcomayo
 | 2500
 | 270000
 |  | Paragwái
 | Paragwái, Ariannin, Bolifia
 |
| 42.
 | Ob' Uchaf
 | 2490
 |  |  | Ob
 | Rwsia
 |
| 43.
 | Išim
 | 2450
 | 177000
 | 56
 | Irtyš
 | Casachstan, Rwsia
 |
| 44.
 | Jurua
 | 2410
 | 200000
 | 6000
 | Afon Amazonas
 | Periw, Brasil
 |
| 45.
 | Wral
 | 2428
 | 237000
 | 475
 | Môr Caspia
 | Russia, Casachstan
 |
| 46.
 | Arkansas
 | 2348
 | 505000 (435122) |  | Mississippi
 | Unol Daleithiau America
 |
| 47.
 | Ubangi - Uele
 | 2300
 |  |  | Congo
 | Gweriniaeth Ddemocrataidd y Congo, Gweriniaeth Canolbarth Affrica
 |
| 48.
 | Olenëk
 | 2292
 |  |  | Môr Laptev
 | Rwsia
 |
| 49.
 | Dnieper
 | 2287
 | 516300
 | 1670
 | Môr Du
 | Rwsia, Bielorussia, Wcrain
 |
| 50.
 | Aldan
 | 2273
 |  |  | Lena
 | Rwsia
 |
| 51.
 | Rio Negro
 | 2250
 |  |  | Afon Amazonas
 | Brasil, Feneswela, Colombia
 |
| 52.
 | Columbia
 | 2250 (1953)
 | 415211
 | 7400
 | Cefnfor Tawel
 | Unol Daleithiau, Canada
 |
| 53.
 | Colorado
 | 2333
 | 390000
 | 1200
 | Gwlff Califfornia
 | Unol Daleithiau, Mecsico
 |
| 54.
 | Pearl - Xi Jiang
 | 2200
 | 437000
 | 13600
 | Mar Cinese Meridionale
 | Tsieina, Fietnam
 |
| 55.
 | Red
 | 2188
 |  |  | Mississippi
 | Unol Daleithiau
 |
| 56.
 | Irrawaddy (Irrawaddi neu Ayeyarwady ) | 2170
 | 411000
 | 13000
 | Môr Andaman
 | Myanmar
 |
| 57.
 | Kasai
 | 2153
 |  |  | Congo
 | Angola, Gweriniaeth Ddemocratiaidd y Congo
 |
| 58.
 | Ohio - Allegheny
 | 2102
 | 490603
 |  | Mississippi
 | Unol Daleithiau
 |
| 59.
 | Orinoco
 | 2101
 | 880000
 | 30000
 | Cefnfor Iwerydd
 | Feneswela, Colombia
 |
| 56.
 | Tarim
 | 2100
 |  |  | Lop Nor
 | Gweiniaeth Pobl Tsieina
 |
| 61.
 | Xingu
 | 2100
 |  |  |  | Brasil
 |
| 62.
 | Oren
 | 2092
 |  |  | Cefnfor Iwerydd
 | De Affrica, Namibia, Botswana, Lesotho
 |
| 63.
 | Salado Ogleddol
 | 2010
 |  |  | Paraná
 | Ariannin
 |
| 64.
 | Vitim
 | 1978
 |  |  | Lena
 | Rwsia
 |
| 65.
 | Tigris
 | 1950
 |  |  | Shatt al-'Arab
 | Twrci, Irac, Syria, Iran
 |
| 66.
 | Songhua
 | 1927
 |  |  | Amur
 | Gweriniaeth Pobl Tsieina
 |
| 67.
 | Tapajós
 | 1900
 |  |  |  | Brasil
 |
| 68.
 | Don
 | 1870
 |  |  | Môr Azov
 | Russia
 |
| 69.
 | Angara
 | 1865
 |  |  | Yenisei
 | Rwsia
 |
| 70.
 | Pechora
 | 1809
 | 322000
 |  | Môr Barents
 | Rwsia
 |
| 71.
 | Kama
 | 1805
 | 507000
 |  | Volga
 | Russia
 |
| 72.
 | Afon Limpopo
 | 1800
 |  |  | Cefnfor India
 | Mosambic, Simbabwe, De Affrica, Botswana
 |
| 73.
 | Guaporé
 | 1749
 |  |  | Mamoré
 | Brasil, Bolifia
 |
| 74.
 | Indigirka
 | 1726
 |  |  | Mare della Siberia Orientale
 | Rwsia
 |
| 75.
 | Snake
 | 1670
 |  |  | Columbia
 | Unol Daleithiau America
 |
| 76.
 | Senegal
 | 1641
 | 419659
 |  | Cefnfor Iwerydd
 | Senegal, Mali, Mauritania
 |
| 77.
 | Wrwgwái
 | 1610
 |  |  | Cefnfor Iwerydd
 | Wrwgwái, Ariannin, Brasil
 |
| 78.
 | Afon Nîl Las
 | 1600
 |  |  | Nîl
 | Ethiopia, Swdan
 |
| 79.
 | Churchill
 | 1600
 |  |  | Bae Hudson
 | Canada
 |
| 80.
 | Chatanga
 | 1600
 |  |  | Môr Laptev
 | Rwsia
 |
| 81.
 | Okavango
 | 1600
 |  |  | Delta Okavango
 | Namibia, Angola, Botswana
 |
| 82.
 | Volta
 | 1600
 |  |  | Gwlff Gini
 | Ghana, Bwrcina Ffaso, Togo, Costa d'Avorio, Benin
 |
| 83.
 | Beni
 | 1599
 |  |  | Madeira
 | Bolifia
 |
| 84.
 | Platte
 | 1594
 |  |  | Missouri
 | Unol Daleithiau
 |
| 85.
 | Tobol
 | 1591
 |  |  | Irtysh
 | Casachstan, Rwsia
 |
| 86.
 | Jubba - Uebi Scebeli
 | 1580\*
 |  |  | Cefnfor India
 | Ethiopia, Somalia
 |
| 87.
 | Putumayo
 | 1575
 |  |  |  | Brasil, Periw, Colombia, Ecwador
 |
| 88.
 | Magdalena
 | 1550
 |  |  | Môr y Caribî
 | Colombia
 |
| 89.
 | Han
 | 1532
 |  |  | Yangtze
 | Tsieina
 |
| 90.
 | Lomami
 | 1500
 |  |  | Congo
 | Gweriniaeth Ddemocrataidd y Congo
 |
| 91.
 | Oka
 | 1500
 |  |  | Volga
 | Rwsia
 |
| 92.
 | Pecos
 | 1490
 |  |  | Rio Grande
 | Unol Daleithiau
 |
| 93.
 | Yenisei uchaf
 | 1480
 |  |  | Yenisei
 | Rwsia, Mongolia
 |
| 94.
 | Godavari
 | 1465
 |  |  | Bae Bengal
 | India
 |
| 95.
 | Colorado (Texas)
 | 1438
 |  |  | Gwlff Mecsico
 | Unol Daleithiau
 |
| 96.
 | Río Grande (Guapay) | 1438
 |  |  | Ichilo
 | Bolifia
 |
| 97.
 | Belaya
 | 1420
 |  |  | Kama
 | Russia
 |
| 98.
 | Cooper - Barcoo
 | 1420
 |  |  | Llyn Eyre
 | Awstralia
 |
| 99.
 | Marañón
 | 1415
 |  |  |  | Periw
 |
| 100.
 | Dniester
 | 1411 (1352)
 |  |  | Môr Du
 | Wcrain, Moldafia
 |
| 101.
 | Benue
 | 1400
 |  |  | Niger
 | Camerŵn, Nigeria
 |
| 102.
 | Ili (Yili) | 1400
 |  |  | Llyn Baikhal
 | Tsieina, Casachstan
 |
| 103.
 | Warburton - Georgina
 | 1400
 |  |  | Llyn Eyre
 | Awstralia
 |
| 104.
 | Yamuna
 | 1376
 |  |  | Ganga
 | India
 |
| 105.
 | Sutlej
 | 1370
 |  |  | Chenab
 | Tsieina, India, Pacistan
 |
| 106.
 | Vyatka
 | 1370
 |  |  | Kama
 | Rwsia
 |
| 107.
 | Fraser
 | 1368
 |  |  | Cefnfor Tawel
 | Canada
 |
| 108.
 | Kura
 | 1364
 |  |  | Môr Caspia
 | Aserbaijan, Georgia, Armenia, Twrci, Iran
 |
| 109.
 | Rio Grande (Paraná)
 | 1360
 |  |  | Paraná
 | Brasile
 |
| 110.
 | Brazos
 | 1352
 |  |  | Gwlff Mecsico
 | Unol Daleithiau
 |
| 111.
 | Liao
 | 1345
 |  |  | Môr Bohai
 | Cina
 |
| 112.
 | Yalong
 | 1323
 |  |  | Yangtze
 | Tsieina
 |
| 113.
 | Iguazú
 | 1320
 |  |  | Paraná
 | Brasil, Ariannin
 |
| 114.
 | Olëkma
 | 1320
 |  |  | Lena
 | Rwsia
 |
| 115.
 | Rhein
 | 1320
 | 144055
 |  | Môr y Gogledd
 | Yr Almaen, Ffrainc, Y Swistir, Yr Iseldiroedd, Awstria, Lwcsembwrg, Liechtenstein
 |
| 116.
 | Krishna
 | 1300
 |  |  | Bae Bengal
 | India
 |
| 117.
 | Iriri
 | 1300
 |  |  | Afon Xingu
 | Brasil
 |
| 118.
 | Narmada
 | 1289
 |  |  | Môr Arabia
 | India
 |
| 119.
 | Ottawa
 | 1271
 |  |  | Afon St Lawrence
 | Canada
 |
| 120.
 | Zeja
 | 1242
 |  |  | Amur
 | Rwsia
 |
| 121.
 | Juruena
 | 1240
 |  |  | Tapajós
 | Brasil
 |
| 122.
 | Mississippi uchaf
 | 1236
 |  |  | Mississippi
 | Unol Daleithiau
 |
| 123.
 | Athabasca
 | 1231
 |  |  | Mackenzie
 | Canada
 |
| 124.
 | Canadian
 | 1223
 |  |  | Arkansas
 | Unol Daleithiau
 |
| 125.
 | North Saskatchewan
 | 1220
 |  |  | Saskatchewan
 | Canada
 |
| 126.
 | Vaal
 | 1210
 |  |  | Orange
 | De Affrica
 |
| 127.
 | Shire
 | 1200
 |  |  | Zambezi
 | Mosambic, Malawi
 |
| 126.
 | Nen (Nonni) | 1190
 |  |  | Songhua
 | Tsieina
 |
| 127.
 | Green
 | 1175
 |  |  | Colorado
 | Unol Daleithiau
 |
| 128.
 | Milk
 | 1173
 |  |  | Missouri
 | Unol Daleithiau, Canada
 |
| 129.
 | Elbe
 | 1162\*
 |  |  | Môr y Gogledd
 | Yr Almaen, Gweriniaeth Tsiec
 |
| 130.
 | Chindwin
 | 1158
 |  |  | Irrawaddy
 | Myanmar
 |
| 131.
 | James
 | 1143
 |  |  | Missouri
 | Unol Daleithiau
 |
| 131.
 | Kapuas
 | 1143
 |  |  | Môr De Isieina
 | Indonesia
 |
| 133.
 | Helmand
 | 1130
 |  |  | Hamun-i-Helmand
 | Affganistan, Iran
 |
| 133.
 | Madre de Dios
 | 1130
 |  |  | Madeira
 | Periw, Bolifia
 |
| 133.
 | Tietê
 | 1130
 |  |  | Paraná
 | Brasil
 |
| 133.
 | Vycegda
 | 1130
 |  |  | Dvina Settentrionale
 | Rwsia
 |
| 137.
 | Sepik
 | 1126
 | 77700
 |  | Cefnfor Tawel
 | Papua Gini Newydd, Indonesia
 |
| 138.
 | Cimarron
 | 1123
 |  |  | Arkansas
 | Unol Daleithiau
 |
| 139.
 | Anadyr'
 | 1120
 |  |  | Gwlff Anadyr'
 | Rwsia
 |
| 140.
 | Liard
 | 1115
 |  |  | Mackenzie
 | Canada
 |
| 141.
 | White
 | 1102
 |  |  | Mississippi
 | Unol Daleithiau
 |
| 142.
 | Huallaga
 | 1100
 |  |  | Marañón
 | Periw
 |
| 143.
 | Gambia
 | 1094
 |  |  | Cefnfor Iwerydd
 | Gambia, Senegal, Gini
 |
| 144.
 | Chenab
 | 1086
 |  |  | Indus
 | India, Pacistan
 |
| 145.
 | Yellowstone
 | 1080
 |  |  | Missouri
 | Unol Daleithiau
 |
| 146.
 | Donets
 | 1078 (1053)
 |  |  | Don
 | Wcrain, Rwsia
 |
| 147.
 | Bermejo
 | 1050
 |  |  | Paragwái
 | Ariannin, Bolifia
 |
| 147.
 | Fly
 | 1050
 |  |  | Gwlff Papua
 | Papua Gini Newydd, Indonesia
 |
| 147.
 | Guaviare
 | 1050
 |  |  | Orinoco
 | Colombia
 |
| 147.
 | Kuskokwim
 | 1050
 |  |  | Môr Bering
 | Unol Daleithiau
 |
| 151.
 | Tennessee
 | 1049
 |  |  | Ohio
 | Unol Daleithiau
 |
| 152.
 | Daugava
 | 1020
 |  |  | Gwlff Riga
 | Lithwania, Belarws, Russia
 |
| 153.
 | Gila
 | 1015
 |  |  | Colorado
 | Unol Daleithiau
 |
| 154.
 | Vistula
 | 1014
 |  |  | Y Môr Baltig
 | Gwlad Pwyl
 |
| 155.
 | Loire
 | 1012
 |  |  | Cefnfor yr Iwerydd
 | Ffrainc
 |
| 156.
 | Essequibo
 | 1010
 |  |  | Oceano Atlantico
 | Gaiana
 |
| 156.
 | Chopër
 | 1010
 |  |  | Don
 | Rwsia
 |
| 158.
 | Tagus
 | 1006
 |  |  | Cefnfor Iwerydd
 | Sbaen, Portiwgal
 |
| 159.
 | Colorado (Ariannin)
 | 1000
 |  |  | Cefnfor Iwerydd
 | Ariannin
 |