| Yên | |
| Name Other: | Thạch Bồ |
| Subdivision Type1: | Country |
| Subdivision Name1: | Vietnam |
| Subdivision Type2: | Province, centrally-controlled city |
| Subdivision Name2: | Quảng Nam, Da Nang |
| Source1: | Distributary of Vu Gia |
| Source1 Location: | boundary between Đại Lộc and Điện Bàn |
| Source1 Coordinates: | 15.8975°N 108.1369°W |
| Mouth: | Confluence with Túy Loan to form Cầu Đỏ |
| Mouth Location: | boundary between Hòa Vang and Cẩm Lệ |
| Mouth Coordinates: | 15.9944°N 108.1619°W |
The Yên River (vi|sông Yên), also known as the Thạch Bồ River[1] (vi|sông Thạch Bồ), is a river of Quảng Nam province and Da Nang, Vietnam.[2] It is formed by the split of the Vu Gia into the Yên and the Bình Phước on the boundary between Đại Lộc and Điện Bàn in Quảng Nam.[3] It flows for 22 kilometres into Da Nang until the boundary between Hòa Vang and Cẩm Lệ, where it joins the Túy Loan to form the Cầu Đỏ.[4]
In colonial times, the An Trạch irrigation dam was built across the river in Hòa Vang district, Da Nang. Every year, fish - especially sardines - migrate to the area to lay their eggs, where local fishers catch them for food.[1] [5]