| Official Name: | Pa Khai |
| Native Name: | ป่าคาย |
| Settlement Type: | Tambon |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type2: | Province |
| Subdivision Name2: | Uttaradit |
| Subdivision Type3: | District |
| Subdivision Name3: | Thong Saen Khan District |
| Population As Of: | 2005 |
| Population Total: | 6030 |
| Timezone: | ICT |
| Utc Offset: | +7 |
Pa Khai (Thai: ป่าคาย, in Thai pronounced as /pàː kʰāːj/) is a village and tambon (sub-district) of Thong Saen Khan District, in Uttaradit Province, Thailand.[1] In 2005 it had a population of 6030 people. The tambon contains nine villages.