| Quế Sơn district | |
| Settlement Type: | District |
| Native Name: | Huyện Quế Sơn |
| Pushpin Map: | Vietnam#Southeast Asia#Asia |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | South Central Coast |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quảng Nam |
| Seat Type: | Capital |
| Seat: | Đông Phú |
| Unit Pref: | Imperial |
| Area Total Km2: | 707 |
| Population As Of: | 2003 |
| Population Total: | 129,190 |
| Timezone: | Indochina Time |
| Utc Offset: | +7 |
is a district (huyện) in Quảng Nam province, Vietnam. During the Vietnam War, it was the site of heavy fighting, including Operation Unions I and II. From 1962 to 1967, the southern side of the valley was part of Quảng Tín province.
As of 2003, the district had a population of 129,190.[1] The district covers an area of 707 km². The district capital lies at Đông Phú.[1]