| Ziyun County | |
| Native Name: | Chinese: 紫云县 · Zijyunf xianq |
| Postal Code Type: | Postal code |
| Settlement Type: | Autonomous county |
| Official Name: | Ziyun Miao and Buyei Autonomous County |
| Image Map1: | Location of Anshun Prefecture within Guizhou (China).png |
| Map Caption1: | Anshun in Guizhou |
| Pushpin Map: | Guizhou#Southwest China |
| Pushpin Label: | Ziyun |
| Coor Pinpoint: | Ziyun County government |
| Coordinates: | 25.751°N 106.0844°W |
| Subdivision Type: | Country |
| Subdivision Name: | China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Guizhou |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Anshun |
| Seat Type: | County seat |
| Seat: | Songshan Subdistrict |
| Area Total Km2: | 2272.94 |
| Population Total: | 293651 |
| Population As Of: | 2020 census |
| Population Density Km2: | auto |
| Population Footnotes: | [1] |
| Timezone: | China Standard |
| Utc Offset: | +8 |
Ziyun Miao and Buyei Autonomous County (; Bouyei: Zijyunf Buxyeeuz Buxqyaix Ziqziqxianq) is a county in the southwest of Guizhou province, China. It is under the administration of the prefecture-level city of Anshun.
Ziyun is divided into 3 subdistricts, 8 towns and 2 townships:[2]