| Qianxinan Prefecture | |
| Settlement Type: | Autonomous prefecture |
| Official Name: | Qianxinan Buyei and Miao Autonomous Prefecture |
| Native Name: | Chinese: 黔西南州 · {{small|Qianfxiynanf zouy |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Guizhou |
| Seat Type: | Prefecutral seat |
| Area Total Km2: | 16804 |
| Population As Of: | 2003 |
| Population Total: | 3,059,400 |
| Demographics Type2: | GDP[1] |
| Demographics2 Title1: | Total |
| Demographics2 Info1: | CN¥ 135.3 billion US$ 19.6 billion |
| Demographics2 Title2: | Per capita |
| Demographics2 Info2: | CN¥ 44,881 US$6,507 |
| Timezone: | China Standard |
| Utc Offset: | +8 |
| Postal Code Type: | Postal code |
| Iso Code: | CN-GZ-23 |
Qianxinan Buyei and Miao Autonomous Prefecture (; Buyei: Qianfxiynanf Buxqyaix Buxyeeuz Ziqziqzouy; Hmu: Qeef Xib Naif Dol Yat Dol Hmub Zid Zid Zeb), is an autonomous prefecture of Guizhou province, People's Republic of China, bordering Guangxi to the south and Yunnan to the west. The name, "Chinese: 黔西南" derives from the prefecture's southwest location in the province; "" is the official abbreviation for Guizhou, while "" means "southwest".
The prefecture is subdivided into 8 county-level divisions: 2 county-level cities, and 6 counties.