The principal

tributaries A tributary, or an ''affluent'', is a stream or river that flows into a larger stream ('' main stem'' or ''"parent"''), river, or a lake. A tributary does not flow directly into a sea or ocean. Tributaries, and the main stem river into which the ...

of the

Chao Phraya River The Chao Phraya River is the major river in Thailand, with its low alluvial plain forming the centre of the country. It flows through Bangkok and then into the Gulf of Thailand. Etymology Written evidence of the river being referred to by the ...

Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...

are the

Pa Sak River The Pa Sak River (, , Pronunciation is a river in central Thailand. The river originates in the Phetchabun Mountains, Dan Sai District, Loei Province, and passes through Phetchabun Province as the backbone of the province. It then passes throu ...

, the

Sakae Krang River The Sakae Krang River (, , ) is a tributary of the Chao Phraya River. It originates in Mae Wong National Park, Nakhon Sawan Province Nakhon Sawan (, , ) is one of Thailand's seventy-six provinces (''changwat''). It lies in lower northern Th ...

, the

Nan River The Nan River (, , ; , ) is a river in Thailand. It is one of the most important tributaries of the Chao Phraya River. Geography The Nan River originates in the Luang Prabang Range, Nan Province. The provinces along the river after Nan Prov ...

(along with its principal confluent the

Yom River The Yom River (, , ; , ) is a river in Thailand. It is the main tributary of the Nan River (which itself is a tributary of the Chao Phraya River). The Yom River has its source in the Phi Pan Nam Range in Pong District, Phayao Province. Leaving P ...

), the

Ping River The Ping River (, , ; , ) along with the Nan River, is one of the two main tributaries of the Chao Phraya River. It originates at Doi Thuai in the Daen Lao Range, in Chiang Dao district, Chiang Mai province. After passing Chiang Mai, it flows th ...

(with its principal confluent the

Wang River The Wang River (, , ; , ) is a river in northern Thailand. Geography The Wang River is long. Its waters flow from north to south. The Wang River has its source in the Phi Pan Nam Range in Wiang Pa Pao District, Chiang Rai Province. One of the ...

), and the

Tha Chin River The Tha Chin River (, , ) is a distributary of the Chao Phraya River, in Thailand. It splits in the province of Chai Nat and then flows west from the Chao Phraya through the central plains, until it empties into the Gulf of Thailand in Samut S ...

.Royal Irrigation Department River Gauges Report
Each of these tributaries (and the Chao Phraya itself) is further tributed by additional minor tributaries often referred to as ''khwae''. All of the tributaries, including the lesser khwae, form an extensive tree-like pattern, with branches flowing through nearly every province in central and northern

. None of the tributaries of the Chao Phraya extend beyond the nation's borders.Google Earth The Nan and the Yom River flow nearly parallel from

Phitsanulok Phitsanulok (, ) is a city municipality in northern Thailand and the capital of Phitsanulok province. It had a city population of 60,827 and an urban population of approximately 200,000 in 2024, making it Thailand's 19th-most populous city p ...

to Chumsaeng in the north of Nakhon Sawan province. The

enters the Ping River near Sam Ngao district in Tak province.

Tributary tree

The following is a tree demonstrating the points at which the major

of the

branch off from the main river and from each other. *

Gulf of Thailand The Gulf of Thailand (), historically known as the Gulf of Siam (), is a shallow inlet adjacent to the southwestern South China Sea, bounded between the southwestern shores of the Indochinese Peninsula and the northern half of the Malay Peninsula. ...

**Chao Phraya River (Drains into the Gulf of Thailand via the Chao Phraya Delta) ***

Noi River The Noi River (, , ) is a river in Thailand.Royal ...

(Joins the Chao Phraya at Bang Sai) ***

(Joins the Lopburi at Ayutthaya Island) ****

Lopburi River The Lopburi River (, , ) is a tributary of the Chao Phraya River in central Thailand. It splits from the Chao Phraya river at Tambon Bang Phutsa, Singburi. Passing through Tha Wung district and the town of Lopburi, it enters the Chao Phraya tog ...

(Joins the Pa Sak at

Ayutthaya Ayutthaya, Ayudhya, or Ayuthia may refer to: * Ayutthaya Kingdom, a Thai kingdom that existed from 1350 to 1767 ** Ayutthaya Historical Park, the ruins of the old capital city of the Ayutthaya Kingdom * Phra Nakhon Si Ayutthaya province (locall ...

) ****Additional tributaries of the Pa Sak include the Muak Lek, Phung, Pa Daeng, Kong, Sonthi, Wang Chomphu, Na, Chun, Duk,

Khon Kaen Khon Kaen (, ) is the capital of Khon Kaen province and the List of municipalities in Thailand#Largest cities by urban population, fourth-largest city in Thailand. It is one of the four major cities of Isan, Northeast Thailand, also known as the ...

, Yai, Saduang Yai, Ban Bong, Tarang and Phaya Klang Rivers. ***

(Joins the Chao Phraya at Uthai Thani) ****Tributaries of the Sakae Krang River include Huai Thap Salao and Khlong Pho. ***

(Joins the Chao Phraya at

Nakhon Sawan Nakhon Sawan (, ) is a city (''thesaban nakhon'') in Thailand. The name literally means "Heavenly City". The city is the capital of Nakhon Sawan province, and covers the complete subdistrict (''tambon'') of Pak Nam Pho and parts of Khwae Yai, Nak ...

) ****

(Joins the Nan within Amphoe Chum Saeng in the

Nakhon Sawan Province Nakhon Sawan (, , ) is one of Thailand's seventy-six provinces (''changwat''). It lies in lower northern Thailand, neighbouring the provinces of Kamphaeng Phet, Phichit, Phetchabun, Lopburi, Sing Buri, Chai Nat, Uthai Thani, and Tak (cl ...

) *****Tributaries of the Yom include

Pong ''Pong'' is a 1972 sports video game developed and published by Atari for arcades. It is one of the earliest arcade video games; it was created by Allan Alcorn as a training exercise assigned to him by Atari co-founder Nolan Bushnell, but B ...

, Ngao, Ngim,

Sin In religious context, sin is a transgression against divine law or a law of the deities. Each culture has its own interpretation of what it means to commit a sin. While sins are generally considered actions, any thought, word, or act considered ...

Suat Suat is a unisex Turkish given name. The name is the Turkish written form of the Arabic given name Suad. People named Suat include: * Suat Aşani (1916–1970), Turkish Olympic fencer * Suat Atalık (born 1964), Turkish chess player * Suat Dervi ...

, Pi, Mok, Phuak, Ramphan, Lai, Khuan and Kam Mi Rivers **** Butsabong River **** Wang Pong River **** Tha Luang River (Joins the Nan at in

Phichit Phichit (, เมือง) is a town (''thesaban mueang'') in central Thailand, capital of Phichit Province. It covers the whole ''tambon'' Nai Mueang of Mueang Phichit district, an area of 12.017 km². As of 2005, it had a population of ...

) *****

Wat Ta Yom River The Wat Ta Yom River () is a tributary of the Nan River in Thailand. Geography This river of many names originates in the mountains of the Noen Maprang District of Phitsanulok Province where it is referred to as the Chomphu River (Thai: คล ...

****** Tha Muen Ram River ******* Chomphu River **** Wang Thong River (Joins the Nan at within

Phichit Province Phichit (, , ) is one of Thailand's seventy-six provinces (''changwat'') lies in lower northern Thailand and 330 km due north of Bangkok. Neighbouring provinces are (from north clockwise) Phitsanulok, Phetchabun, Nakhon Sawan, and Kampha ...

) ****

Khwae Noi River The River Kwai (), more correctly Khwae Noi (, , 'small tributary') or Khwae Sai Yok (, ), is a river in western Thailand. It rises to the east of the Salween in the north–south spine of the Bilauktaung range near, but not over the border wi ...

(Joins the Nan within Chom Thong, Amphoe Mueang Phitsanulok in the Phitsanulok Province) ***** Om Sing River ****** Fua River ***** Phak River **** Tron River (Joins the Nan within Uttaradit Province) **** Pat River (Joins the Nan within Uttaradit Province) ***** Phai River **** Wa River (Joins the Nan within Nan Province) **** Haet River ****

Yao River Yao or YAO may refer to: People * Yao (surname), the transliteration of Chinese family names 姚, 銚, and 么 * Emperor Yao, a mythical Chinese ruler and emperor * Yao Ming (born 1980), Chinese basketball all-star who played for the Houston Roc ...

**** Hao River (Joins the Nan at Ban A Ham within Nan Province) ***** Yang River ***** Bua River ****

Khun River Khun may refer to: * Khun (, long vowel, middle tone), the colloquial Thai name for the Golden Shower Tree * Khun (courtesy title) (, short vowel, middle tone), a common Thai honorific * Khun (noble title) (, short vowel, rising tone), a former ...

**** Pua River **** Yao River (2) ****Additional tributaries of the Nan include the Than,

Khan Khan may refer to: * Khan (surname), including a list of people with the name * Khan (title), a royal title for a ruler in Mongol and Turkic languages and used by various ethnicities Art and entertainment * Khan (band), an English progressiv ...

, Khlung, Haeng River, Fia, Kaem, Kap, Kleung, Bang Kaeo, Grung Grak, Ban Mung, and Sai Yoi Rivers, although the Royal Irrigation Department report provides insufficient data to link them to tributary tree. ***

(Joins the Chao Phraya at

) ****

Khlung River (2) Khlung (, ) is the southernmost district (''Districts of Thailand, amphoe'') of Chanthaburi province, eastern Thailand. Geography Neighboring districts are (from the northwest clockwise) Amphoe Laem Sing district, Laem Sing, Mueang Chanthaburi ...

**** Suan Mak River (Joins the Ping at ) ****

Wang Chao River Wang may refer to: Names * Wang (surname) (王), a common Chinese surname * Wāng (汪), a less common Chinese surname * Titles in Chinese nobility * A title in Korean nobility * A title in Mongolian nobility Places * Wang River in Thailand ...

(Joins the Ping at ) **** Pra Dang River (Joins the Ping at ) **** Raka River (Placement in tributary tree is approximate, geographical coordinates unavailable due to poor satellite resolution) ****

(Joins the Ping at in the town of Tak) *****Tributaries include Mo, Tui, Chang &

Soi In Thailand, a ''soi'' ( ) is a side street that branches off of a major street (''thanon'', ). An alley is called a ''trok'' (). Overview Sois are usually numbered, and are referred to by the name of the major street and the number, as in "S ...

Rivers **** Tak River (Joins the Ping at ) ****

Ko River A KO is a knockout in various sports, such as boxing and martial arts. K.O., Ko or Kō may also refer to: Arts and entertainment Music * KO (musician), Canadian musician who plays a fusion of hip hop and folk music * ''K.O.'' (album), a 2021 ...

(Joins the Ping at ) **** Tun River (Placement in tributary tree is approximate, geographical coordinates unavailable due to poor satellite resolution) **** Pa River **** Chaem River (Joins the Ping at ) ****

Klang River The Klang River () flows through Kuala Lumpur and Selangor in Malaysia and eventually flows into the Straits of Malacca. It is approximately in length and drains a basin of about . The Klang River has 11 major tributaries. Because the river flo ...

(Joins the Ping at ) ****

Li River The Li River or Li Jiang ( zh, c=漓江, p=Lí Jiāng) is the name for the upper reaches of the Gui River in northeastern Guangxi, China. It is part of the Xijiang River system in the Pearl River basin, flowing from Xing'an County to Pingle C ...

(Joins the Ping at ) **** Tun River (2) (Placement in tributary tree is approximate, geographical coordinates unavailable due to poor satellite resolution) **** Khan River (2) (Joins the Ping at ) ***** Wang River (2) (Joins the Khan at ) **** Kuang River (Joins the Ping at ) ***** Tha River (Joins Kuang at ) ****** Sapuat River (Placement in tributary tree is approximate, geographical coordinates unavailable due to inaccurate station data from Royal Irrigation Department) **** Khanat River (Placement in tributary tree is approximate, geographical coordinates unavailable due to poor satellite resolution) ****

San River The San (; ''Sian''; ) is a river in southeastern Poland and western Ukraine. It is a tributary of the river Vistula. With a length of , the San is the 6th-longest Polish river. It has a basin area of 16,877 km2, of which 14,426 k ...

(Placement in tributary tree is approximate, geographical coordinates presently undeterminable due to recently built dam) ****

Tip River Tip or TIP may refer to: Common meanings * Tip (gambling) * Tip (gratuity) * Tip (law enforcement) * another term for advice Science and technology * Tank phone, a device allowing infantry to communicate with the occupants of an armoured vehic ...

(Placement in tributary tree is approximate, geographical coordinates presently undeterminable due to recently built dam) **** Phaem River (Placement in tributary tree is approximate, geographical coordinates unavailable due to poor satellite resolution) **** Mempin River (Placement in tributary tree is approximate, geographical coordinates unavailable due to poor satellite resolution) **** Lai River (2) (Placement in tributary tree is approximate, geographical coordinates unavailable due to poor satellite resolution) **** Sa River (Joins the Ping at ) **** Rim River (Joins the Ping at ) **** Nai River (Placement in tributary tree is approximate, geographical coordinates unavailable due to poor satellite resolution) **** Taeng River (Joins the Ping at ) **** Ngat River (Joins the Ping at ) ***Additional tributaries of the Chao Phraya include the

Wang River (3) The Wang River (, , ; , ) is a river in northern Thailand. Geography The Wang River is long. Its waters flow from north to south. The Wang River has its source in the Phi Pan Nam Range in Wiang Pa Pao District, Chiang Rai Province. One of the p ...

, the

Yai River (2) The Yai River is a river of Thailand. It is a tributary of the Pa Sak River, part of the Chao Phraya River The Chao Phraya River is the major river in Thailand, with its low alluvial plain forming the centre of the country. It flows through Ba ...

, the Bang Kaeo River, and the Khun Kaeo River. **

***Tributaries of the Tha Chin include the Kra Sieo,

Yang Yang may refer to: * Yang, in yin and yang, one half of the two symbolic polarities in Chinese philosophy * Korean yang, former unit of currency of Korea from 1892 to 1902 * YANG, a data modeling language for the NETCONF network configuration p ...

, Tawip, Chorakhe Sam, Bang Len and Chin Si Rivers. Rivers marked with a number in parentheses indicate multiple rivers in this system bearing the same name in English.

References

{{DEFAULTSORT:Tributaries of the Chaophraya River, List of Chao Phraya River

Chao Phraya The Chao Phraya River is the major river in Thailand, with its low alluvial plain forming the centre of the country. It flows through Bangkok and then into the Gulf of Thailand. Etymology Written evidence of the river being referred to by the ...