| Cẩm Thủy district | |
| Settlement Type: | District |
| Native Name: | Huyện Cẩm Thủy |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | North Central Coast |
| Subdivision Type2: | Province |
| Subdivision Name2: | Thanh Hóa |
| Seat Type: | Capital |
| Seat: | Cẩm Thủy |
| Unit Pref: | Imperial |
| Area Total Km2: | 430 |
| Population As Of: | 2018 |
| Population Total: | 113,580 |
| Timezone: | UTC + 7 |
| Utc Offset: | +7 |
Cẩm Thủy is a district (huyện) of Thanh Hóa province in the North Central Coast region of Vietnam.
As of 2003 the district had a population of 110,815.[1] The district covers an area of 430 km2. The district capital lies at Cẩm Thủy.[1]