List of tributaries of the Chao Phraya River
The principal tributaries of the Chao Phraya River of Thailand are the Pa Sak River, the Sakae Krang River, the Nan River, the Ping River, and the Tha Chin River. Each of these tributaries 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 Thailand. None of the tributaries of the Chao Phraya extend beyond the nation's borders. The Nan and the Yom River flow nearly parallel from Phitsanulok to Chumsaeng in the north of Nakhon Sawan province. The Wang River 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 tributaries of the Chao Phraya River branch off from the main river and from each other.- Gulf of Thailand
- *Chao Phraya River
- **Noi River
- **Pa Sak River
- ***Lopburi River
- ***Additional tributaries of the Pa Sak include the Muak Lek, Phung, Pa Daeng, Kong, Sonthi, Wang Chomphu, Na, Chun, Duk, Khon Kaen, Yai, Saduang Yai, Ban Bong, Tarang and Phaya Klang Rivers.
- **Sakae Krang River
- ***Tributaries of the Sakae Krang River include Huai Thap Salao and Khlong Pho.
- **Nan River
- ***Yom River
- ****Tributaries of the Yom include Pong, Ngao, Ngim, Sin, Suat, Pi, Mok, Phuak, Ramphan, Lai, Khuan and Kam Mi Rivers
- ***Butsabong River
- ***Wang Pong River
- ***Tha Luang River
- ****Wat Ta Yom River
- *****Tha Muen Ram River
- ******Chomphu River
- ***Wang Thong River
- ***Khwae Noi River
- ****Om Sing River
- *****Fua River
- ****Phak River
- ***Tron River
- ***Pat River
- ****Phai River
- ***Wa River
- ***Haet River
- ***Yao River
- ***Hao River
- ****Yang River
- ****Bua River
- ***Khun River
- ***Pua River
- ***Yao River
- ***Additional tributaries of the Nan include the Than, Khan, 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.
- **Ping River
- ***Khlung River
- ***Suan Mak River
- ***Wang Chao River
- ***Pra Dang River
- ***Raka River
- ***Wang River
- ****Tributaries include Mo, Tui, Chang & Soi Rivers
- ***Tak River
- ***Ko River
- ***Tun River
- ***Pa River
- ***Chaem River
- ***Klang River
- ***Li River
- ***Tun River
- ***Khan River
- ****Wang River
- ***Kuang River
- ****Tha River
- *****Sapuat River
- ***Khanat River
- ***San River
- ***Tip River
- ***Phaem River
- ***Mempin River
- ***Lai River
- ***Sa River
- ***Rim River
- ***Nai River
- ***Taeng River
- ***Ngat River
- **Additional tributaries of the Chao Phraya include the Wang River, the Yai River, the Bang Kaeo River, and the Khun Kaeo River.
- *Tha Chin River
- **Tributaries of the Tha Chin include the Kra Sieo, Yang, Tawip, Chorakhe Sam, Bang Len and Chin Si Rivers.