| Official Name: | Ban Siao |
| Settlement Type: | Tambon |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type2: | Province |
| Subdivision Name2: | Uttaradit |
| Subdivision Type3: | District |
| Subdivision Name3: | Fak Tha District |
| Population As Of: | 2005 |
| Population Total: | 3392 |
| Timezone: | ICT |
| Utc Offset: | +7 |
Ban Siao (Thai: บ้านเสี้ยว, in Thai pronounced as /bâːn sîa̯w/) is a village and tambon (sub-district) of Fak Tha District, in Uttaradit Province, Thailand.[1] In 2005 it had a population of 3,392 people. The tambon contains six villages.