| Chao Phraya Dam | |
| Location Map: | Thailand |
| Location Map Size: | 125 |
| Location Map Caption: | Location in Thailand |
| Coordinates: | 15.1581°N 100.18°W |
| Country: | Thailand |
| Location: | Sapphaya, Chai Nat |
| Construction Began: | 1952 |
| Opening: | 1957 |
| Owner: | Royal Irrigation Department |
| Dam Type: | B |
| Dam Crosses: | Chao Phraya River |
The Chao Phraya Dam (Thai: เขื่อนเจ้าพระยา,, in Thai pronounced as /kʰɯ̀a̯n t͡ɕâːw pʰrā.jāː/) is a barrage dam in Sapphaya district, Chai Nat province, Thailand. It regulates the flow of the Chao Phraya River as it passes into lower central Thailand, distributing water to an area of in seventeen provinces as part of the Greater Chao Phraya Irrigation Project. The dam has sixteen 12.5-metre gates. It was built between 1952 and 1957.[1]