| Official Name: | Wiang Hao |
| Native Name: | เวียงห้าว |
| Settlement Type: | Tambon |
| Subdivision Type: | Country |
| Subdivision Type2: | Province |
| Subdivision Name2: | Chiang Rai |
| Subdivision Type3: | Amphoe |
| Subdivision Name3: | Phan |
| Population As Of: | 2005 |
| Population Total: | 3501 |
| Timezone: | Thailand |
| Utc Offset: | +7 |
| Coordinates: | 19.5781°N 99.8831°W |
Wiang Hao (th|เวียงห้าว) is a village and tambon (subdistrict) of Phan District, in Chiang Rai Province, Thailand.[1] In 2005 it had a total population of 3,501 people. The tambon contains 8 villages.