| Official Name: | Na Muean |
| Native Name: | นาหมื่น |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Nan |
| Established Title: | District established |
| Population Total: | 14817 |
| Population As Of: | 2009 |
| Population Density Km2: | auto |
| Leader Title: | Marshal |
| Leader Name: | Suraphan Trimongkon |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 55180 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 5510 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 18.1894°N 100.6589°W |
Na Muean (Thai: นาหมื่น, in Thai pronounced as /nāː mɯ̀ːn/) is a district (amphoe) in the southern part of Nan province, northern Thailand.
The minor district (king amphoe) Na Muean was established on 9 October 1978 as a subordinate of Na Noi district, from which it was split off.[1] [2] Originally it consisted of the three tambons, Na Thanung, Bo Kaeo, and Mueang Li. It was upgraded to a full district on 4 July 1994.[3]
Neighboring districts are, from the north clockwise, Na Noi of Nan Province, Ban Khok, Fak Tha, Nam Pat and Tha Pla of Uttaradit province, Mueang Phrae and Rong Kwang of Phrae province.
The district is divided into four sub-districts (tambons), which are further subdivided into 48 villages (mubans). Bo Kaeo is the township (thesaban tambon) and covers the complete area of tambon Bo Kaeo. There are a further three tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Na Thanung | นาทะนุง | 17 | 4,989 | ||
| 2. | Bo Kaeo | บ่อแก้ว | 14 | 4,756 | ||
| 3. | Mueang Li | เมืองลี | 7 | 2,126 | ||
| 4. | Ping Luang | ปิงหลวง | 10 | 3,168 |