| Official Name: | Chun |
| Native Name: | จุน |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Phayao |
| Subdivision Type2: | Seat |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 52066 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 56150 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 5602 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 19.3372°N 100.135°W |
Chun (Thai: จุน, in Thai pronounced as /t͡ɕūn/) is a district (amphoe) of Phayao province in northern Thailand.
Chun District dates back to an ancient city named Wiang Lo, which is of similar age as Mueang Phayao.
Neighboring districts are (from the east clockwise): Chiang Kham, Pong and Dok Khamtai of Phayao Province, Pa Daet and Thoeng of Chiang Rai province.
The important water resources are the Ing and Chun Rivers.
The district is divided into seven sub-districts (tambons), which are further subdivided into 88 villages (mubans). Huai Khao Kam is a township (thesaban tambon) covering parts of tambon Huai Khao Kam. There are a further six tambon administrative organization (TAO).
| No. | Name | Thai name | Pop. | |||
|---|---|---|---|---|---|---|
| 1. | Huai Khao Kam | ห้วยข้าวก่ำ | 8,893 | |||
| 2. | Chun | จุน | 9,889 | |||
| 3. | Lo | ลอ | 6,724 | |||
| 4. | Hong Hin | หงส์หิน | 7,157 | |||
| 5. | Thung Ruang Thong | ทุ่งรวงทอง | 8,072 | |||
| 6. | Huai Yang Kham | ห้วยยางขาม | 6,102 | |||
| 7. | Phra That Khing Kaeng | พระธาตุขิงแกง | 5,229 |