Basin Chao Phraya
Chao Phraya River
แม่น้ำเจ้าพระยา
The main river of central Thailand. It is formed where the Ping River and the Nan River meet at Pak Nam Pho in Nakhon Sawan province. It flows through the central plains and Bangkok to the Gulf of Thailand in Samut Prakan province.
Key facts
- Length
- about 380 kmMeasured along the river on this map; official figures can differ with the method used
- Source
- Nakhon Sawan province
- Flows into
- Gulf of Thailand, Samut Prakan province
- Basin
- Chao Phraya
- Provinces (10)
- Nakhon Sawan, Chai Nat, Uthai Thani, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Pathum Thani, Nonthaburi, Bangkok, Samut Prakan
- Tributaries on the map
- Ping RiverNan RiverSakae Krang RiverPa Sak RiverNoi River
- Dams on the river
- Chao Phraya Dam
Chao Phraya River water level today
19 automatic gauging stations on this river, highest water relative to the bank first. As of 15 Nov 2026, 07:50
| Station | Location | Level (m MSL) | Of bank-full | Status | Measured |
|---|---|---|---|---|---|
| Chao Phraya 4 | Mueang Chai Nat District, Chai Nat | 16.71 | 94% | High | 15 Nov 2026, 07:50 |
| Chao Phraya 15 | Thon Buri District, Bangkok | 0.86 | 93% | High | 15 Nov 2026, 07:50 |
| Chao Phraya 14 | Pak Kret District, Nonthaburi | 1.01 | 91% | High | 15 Nov 2026, 07:50 |
| กรมชลประทานสามเสน | Dusit District, Bangkok | 0.62 | 90% | High | 15 Nov 2026, 07:00 |
| Khlong Lat Bang Yo 1 Gate | Phra Pradaeng District, Samut Prakan | 1.26 | 90% | High | 15 Nov 2026, 07:50 |
| บ้านป้อม | Phra Nakhon Si Ayutthaya District, Phra Nakhon Si Ayutthaya | 2.75 | 88% | High | 15 Nov 2026, 07:00 |
| Chao Phraya 12 | Bang Pa-in District, Phra Nakhon Si Ayutthaya | 1.27 | 88% | High | 15 Nov 2026, 07:50 |
| Chao Phraya 11 | Phra Nakhon Si Ayutthaya District, Phra Nakhon Si Ayutthaya | 2.47 | 75% | High | 15 Nov 2026, 07:50 |
| บ้านบางแก้ว | Mueang Ang Thong District, Ang Thong | 4.83 | 70% | Normal | 15 Nov 2026, 07:00 |
| Chao Phraya 8 | Mueang Ang Thong District, Ang Thong | 4.44 | 67% | Normal | 15 Nov 2026, 07:50 |
| Chao Phraya 1 | Mueang Nakhon Sawan District, Nakhon Sawan | 19.19 | 62% | Normal | 15 Nov 2026, 07:50 |
| บ้านบางพุทรา | Mueang Sing Buri District, Sing Buri | 7.30 | 62% | Normal | 15 Nov 2026, 07:00 |
| Chao Phraya 7 | Phrom Buri District, Sing Buri | 5.90 | 59% | Normal | 15 Nov 2026, 07:50 |
| Khlong Lat Bang Yo 2 Gate | Phra Pradaeng District, Samut Prakan | -0.14 | 59% | Normal | 11 Nov 2026, 21:40 |
| ท้ายเขื่อนเจ้าพระยา | Sapphaya District, Chai Nat | 10.22 | 57% | Normal | 15 Nov 2026, 07:00 |
| Chao Phraya 3 | Manorom District, Chai Nat | 15.78 | 55% | Normal | 15 Nov 2026, 07:50 |
| Chao Phraya 5 | Sapphaya District, Chai Nat | 9.49 | 53% | Normal | 15 Nov 2026, 07:50 |
| Chao Phraya 6 | In Buri District, Sing Buri | 8.58 | 52% | Normal | 15 Nov 2026, 07:50 |
| ค่ายจิรประวัติ | Mueang Nakhon Sawan District, Nakhon Sawan | 19.58 | 51% | Normal | 15 Nov 2026, 07:00 |
Data from the National Hydroinformatics Data Center (ThaiWater), HII, refreshed every 10 minutes
Frequently asked questions
- Which provinces does the Chao Phraya River flow through?
- The Chao Phraya River flows through 10 provinces: Nakhon Sawan, Chai Nat, Uthai Thani, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Pathum Thani, Nonthaburi, Bangkok and Samut Prakan.
- How long is the Chao Phraya River?
- The Chao Phraya River is about 380 km long, measured along the river on this map. Official figures can differ slightly with the method used.
- Where does the Chao Phraya River come from?
- The Chao Phraya River rises in Nakhon Sawan province.
- Where does the Chao Phraya River reach the sea?
- The Chao Phraya River flows into the Gulf of Thailand in Samut Prakan province.
- Which dams are on the Chao Phraya River?
- Dams on the Chao Phraya River on this map: Chao Phraya Dam.
- What is the Chao Phraya River water level today?
- Of 19 gauging stations, 0 are over the bank and 8 have high water. Data as of 15 Nov 2026, 07:50.
- What is the Chao Phraya River called in Thai?
- In Thai the Chao Phraya River is แม่น้ำเจ้าพระยา.