| Official Name: | Wiang Pa Pao |
| Native Name: | เวียงป่าเป้า |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Chiang Rai |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Wiang |
| Established Title: | District established |
| Population Total: | 68198 |
| Population As Of: | 2008 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 57170 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 5711 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 19.3483°N 99.5067°W |
Wiang Pa Pao (; in Thai pronounced as /wīaŋ pàː pâw/) is the southwesternmost district (amphoe) of Chiang Rai province, northern Thailand.
Neighboring districts are (from the north clockwise): Mae Suai and Phan of Chiang Rai Province; Wang Nuea and Mueang Pan of Lampang province; Doi Saket and Phrao of Chiang Mai province.
The Khun Tan Range runs along the west side of the district and its highest point, 2,031 m high Doi Mae Tho, is at its southwest end.
Wiang Pa Pao was one of the mueang in northern Thailand. In 1905 the District Wiang Pa Pao was merged with Mueang Phong and renamed Mae Suai,[1] while the central area of the old mueang kept the name as the minor district (King Khwaeng) Wiang Pa Pao. In 1907 it was upgraded to a full district.[2]
The district is divided into seven sub-districts (tambons), which are further subdivided into 92 villages (mubans). There are two sub-district municipalities (thesaban tambons). Wiang Pa Pao covers parts of tambon Wiang, and Mae Khachan covers parts of tambon Mae Chai. There are a further seven tambon administrative organizations (TAO).
| No. | Name | Thai | Villages | Pop.[3] | |
|---|---|---|---|---|---|
| 1. | San Sali | สันสลี | 13 | 9,051 | |
| 2. | Wiang | เวียง | 12 | 15,521 | |
| 3. | Ban Pong | บ้านโป่ง | 7 | 5,193 | |
| 4. | Pa Ngio | ป่างิ้ว | 16 | 9,375 | |
| 5. | Wiang Kalong | เวียงกาหลง | 15 | 9,572 | |
| 6. | Mae Chedi | แม่เจดีย์ | 16 | 9,742 | |
| 7. | Mae Chedi Mai | แม่เจดีย์ใหม่ | 14 | 9,744 |