WThis is a list of notable rivers of Mongolia, arranged geographically by river basin.
WThe Chikoy is a river in Zabaykalsky Krai and the Buryat Republic in Russia, which partially flows along the Russia-Mongolia border. It is a right tributary of the Selenga. The length of the Chikoy is 769 kilometres (478 mi). The area of its basin is 46,200 square kilometres (17,800 sq mi).
WChuluut River is a river flowing through the valleys of the Khangai Mountains in central Mongolia, and a tributary of the Ider River. It is 415 km long, the width at the mouth into the Ider river is 80 m, the maximum depth is 3 m. It is usually frozen from November to April.
WThe Egiin Gol is a river in the Khövsgöl and Bulgan aimags in northern Mongolia. It is the only outflow of Lake Khövsgöl and a left tributary of the Selenge river. It is 475 kilometres (295 mi) long, and has a drainage basin of 49,100 square kilometres (19,000 sq mi). Wooden bridges exist near Khatgal and in Tünel sum, and a concrete bridge has been built in Erdenebulgan. In Bulgan aimag there is a bridge between Teshig and Khutag-Öndör sums.
WIder River is a river in the Khövsgöl and Zavkhan aimags in northwestern Mongolia and is, together with the Delgermörön river, one of the sources of the Selenge river. It is 452 kilometres (281 mi) long, and has a drainage basin of 24,600 square kilometres (9,500 sq mi). The source is in the Khangai range, the confluence with the Delgermörön is in Tömörbulag. The river is frozen 170–180 nights per year. There is a wooden bridge, which was built in 1940, near Jargalant and a concrete bridge in Galt.
WThe Khalkh River is a river in eastern Mongolia and northern China's Inner Mongolia region. The river is also referred to with the Mongolian genitive suffix -iin as the Khalkhyn Gol or River of Khalkh.
WKhanui River is a river flowing down through the valleys of the Khangai Mountains in central Mongolia. It starts in the Chuluut sum of Arkhangai aimag at the north slopes of the Khan-Öndör mountain. It passes next to the center of Erdenemandal sum, and ends in the Khishig-Öndör sum of Bulgan aimag where it discharges into the Selenge. It is 421 kilometres (262 mi) long, and has a drainage basin of 14,600 square kilometres (5,600 sq mi).
WKharaa River is a river in central northern Mongolia. It starts in a confluence between Sögnögör River and Mandal River near the center of Batsümber sum in Töv aimag, and then continues in a roughly north-western direction through Selenge aimag. On the last stretch it flows through the Darkhan-Uul aimag, running along its western border and passing the city of Darkhan before entering the Orkhon River near the northern tip of the aimag.
WKherlen River is a river of 1,254 km length in Mongolia and China.
WKhovd River is a river in Mongolia. It flows from Tavan Bogd mountain of the Altai Mountains to Khar-Us Lake. The length of the river is 516 kilometres.
WThe Little Yenisey a river in northern Mongolia and in Tuva, Russia. At its confluence with the Great Yenisey in Kyzyl (Tuva), the Yenisey is formed. It is 563 kilometres (350 mi) long, and has a drainage basin of 58,700 square kilometres (22,700 sq mi). It rises in the Darkhad Valley in northwestern Khövsgöl aimag, Mongolia under the name Shishged Gol. Within Tuva it is called Kyzyl-Khem and then Kaa-Khem or Maly Yenisey.
WThe Menza is a river in Zabaykalsky Krai in Russia, and Töv Province, Mongolia. It is the largest tributary of the Chikoy. Its length is 337 kilometres (209 mi). The area of its basin is 13,800 square kilometres (5,300 sq mi).
WThe Ongi River flows from the southeastern slopes of the Khangai Mountains in Övörkhangai Province for 435 kilometres or 270 miles through the endorheic Ongi River Basin in Mongolia and through the aimag capital Arvaikheer. In some particularly wet years, it used to empty into Ulaan Lake in north central Ömnögovi Province, in most years it dries up earlier. In recent years it has been additionally threatened by 37 mining operations within the basin, but successful pressure by Tsetsgeegiin Mönkhbayar and the Ongi River Basin Movement helped convince 35 of the operations to cease explorations and harmful activities in the region. The water and groundwater in this area may be contaminated with mercury and cyanide from the mining industry.
WThe Onon is a river in Mongolia and Russia. It is 1,032 kilometres (641 mi) long, and has a drainage basin of 96,200 square kilometres (37,100 sq mi).
WThe Orkhon River is a river in Mongolia.
WThe river 'Selbe' flows at an altitude between 1850 and 1350 meters above sea level through the southern part of the Khentii mountain system in the central part of Mongolia. This river is 26.2 km long and the river basin covers 220 square kilometers.
WThe Selenga or Selenge is a major river in Mongolia and Buryatia, Russia. Originating from its headwater tributaries, the Ider and the Delger mörön, it flows for 992–1,024 kilometres (616–636 mi) before draining into Lake Baikal. The Selenga therefore makes up the most distant headwaters of the Yenisey-Angara river system.
WThe Tamir is a river flowing through the valleys of the Khangai Mountains in the Arkhangai aimag of central Mongolia.
WThe Tes River is a river in northwestern Mongolia and southern Tuva, Russia. Its spring is in Tsagaan-Uul sum in Khövsgöl. The river then flows through Zavkhan (Mongolia), Tuva (Russia), next back to Uvs (Mongolia) before entering Uvs Lake. While in Khövsgöl, there is a wooden bridge near Tsetserleg and a concrete bridge near Bayantes on the road to Kyzyl, Russia.
WThe Tuul River or Tula River is a river in central and northern Mongolia. Sacred to the Mongols, the Tuul is generally called the Khatan (Queen) Tuul in Mongolian. It is 704 kilometres or 437 miles long and drains an area of 49,840 square kilometres or 19,240 square miles. The Secret History of the Mongols frequently mentions a "Black Forest of the Tuul River" where the palace of Ong Khan was located.
WUilgan River is a river in the Tsagaan-Üür Sum of Khövsgöl Aimag in Mongolia.
WThe Ulungur River or Urungu, in its upper reaches in Mongolia known as the Bulgan River, is a river of China and Mongolia. It rises in the Altai Mountains in western Mongolia, flows south into China's Xinjiang, where it turns north-west to empty into the Ulungur Lake. It is about 700 km long.
WThe Üür River is a river in the Khövsgöl aimag of northern Mongolia. It starts in about 30 km from the Russian border in Tsagaan-Üür sum, from the confluence of the Old Üür and the Young Üür . The river is a tributary of the Egiin Gol, which it meets in the Erdenebulgan sum.
WZavkhan River is a river in Mongolia. It flows from Khangai Mountains to Lake Khyargas, and has a draining area of over 30,055 square miles. The river forms most of the border between the Govi-Altai and Zavkhan aimags. The length of the river is 670 kilometres (420 mi).