| Shimian County | |
| Postal Code Type: | Postal code |
| Settlement Type: | County |
| Subdivision Type: | Country |
| Subdivision Name: | China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Sichuan |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Ya'an |
| Seat Type: | County seat |
| Seat: | Xinmian Subdistrict |
| Area Total Km2: | 2678 |
| Population Total: | 114116 |
| Population As Of: | 2020 |
| Population Density Km2: | auto |
| Population Footnotes: | [1] |
| Coordinates: | 29.2264°N 102.3603°W |
| Timezone: | China Standard |
| Utc Offset: | +8 |
Shimian County (; Sichuan Yi; Nuosu: ꏂꂴꑤ shy miep xiep;) is both the southernmost and westernmost county in the prefecture-level city of Ya'an, Sichuan Province, China. The county seat, Miancheng Subdistrict (Chinese: 棉城街道), and the neighboring town, Xinmian (Chinese: 新棉镇), are often together referred to as Shimian.[2] As of the 2010 census, Shimian County has a population of 123,600.[3] The G5 Beijing–Kunming Expressway now passes through Shimian along the route between Kunming and Chengdu.[4]
The county is located at the eastern edge of the Hengduan Mountains and surrounds the Dadu River. The mountain ranges in Shimian County consist of the Daxue Mountains in the west, the Xiaoxiang Range to the southeast, and the Daxiang Range to the northeast.
Shimian County administers 1 subdistrict, 3 towns, 3 townships and 5 ethnic townships:[5]