| Official Name: | Huai Sai |
| Native Name: | ห้วยทราย |
| Settlement Type: | Tambon |
| Subdivision Type: | Country |
| Subdivision Type2: | Province |
| Subdivision Name2: | Chiang Mai |
| Subdivision Type3: | Amphoe |
| Subdivision Name3: | San Kamphaeng |
| Population As Of: | 2020 |
| Population Total: | 5,964 |
| Timezone: | TST |
| Utc Offset: | +7 |
| Latns: | N |
| Longew: | E |
| Postal Code Type: | Postal code |
| Blank Name: | TIS 1099 |
Huai Sai (Thai: ห้วยทราย) is a tambon (subdistrict) of San Kamphaeng District, in Chiang Mai Province, Thailand. In 2020, it had a total population of 5,964 people.[1]
The tambon is subdivided into 8 administrative villages (muban).
| No. | Name | Thai | |
|---|---|---|---|
| 1. | Ban Mae Tat | บ้านแม่ตาด | |
| 2. | Ban Nong Sae | บ้านหนองแสะ | |
| 3. | Ban Lan Tong | บ้านล้านตอง | |
| 4. | Ban San Khao Khaep | บ้านสันเข้าแคบ | |
| 5. | Ban Mo | บ้านหม้อ | |
| 6. | Ban Doi Sio | บ้านดอยซิว | |
| 7. | Ban Pa Tueng | บ้านป่าตึง | |
| 8. | Ban Pha Chuk | บ้านผาจุก |
The whole area of the subdistrict is covered by the subdistrict municipality (Thesaban Tambon) Huai Sai (เทศบาลตำบลห้วยทราย).