| Đông Sơn district | |
| Settlement Type: | District |
| Native Name: | Huyện Đông Sơn |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | North Central Coast |
| Subdivision Type2: | Province |
| Subdivision Name2: | Thanh Hóa |
| Seat Type: | Capital |
| Seat: | Rừng Thông |
| Unit Pref: | Imperial |
| Area Total Km2: | 106 |
| Population As Of: | 2018 |
| Population Total: | 110,700 |
| Timezone: | UTC + 7 |
| Utc Offset: | +7 |
Đông Sơn is a rural district of Thanh Hóa province in the North Central Coast region of Vietnam. the district had a population of 109,819.[1] The district covers an area of 106 km². The district capital lies at Rừng Thông.[1]
The district is divided into fifteen communes and one township: