| Official Name: | Rasi Salai |
| Native Name: | ราษีไศล |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Sisaket |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Mueang Khong |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 82333 |
| Population As Of: | 2000 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 33160 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 3309 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 15.3403°N 104.1539°W |
Rasi Salai (Thai: ราษีไศล, in Thai pronounced as /rāː.sǐː sā.lǎj/) is a district (amphoe) in the northern part of Sisaket province, northeastern Thailand.
Neighboring districts are (from the north clockwise): Phanom Phrai of Roi Et province; Sila Lat of Sisaket Province; Maha Chana Chai and Kho Wang of Yasothon province; Yang Chum Noi, Mueang Sisaket, Uthumphon Phisai, and Bueng Bun of Sisaket; and Rattanaburi of Surin province.
The main river of the district is the Mun.
The district was renamed from Khong to Rasi Salai in 1939.[1]
The Rasi Salai Dam was built here in 1994 and unofficially decommissioned in July 2000 following devastation of local farming villages as documented by Living River Siam.[2]
The district is divided into 13 sub-districts (tambons), which are further subdivided into 190 villages (mubans). Mueang Khong is a township (thesaban tambon) and covers parts of tambon Mueang Khong. There are a further 13 tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Mueang Khong | เมืองคง | 15 | 7,523 | ||
| 2. | Mueang Khaen | เมืองแคน | 14 | 6,600 | ||
| 3. | Nong Khae | หนองแค | 17 | 7,803 | ||
| 6. | Chik Sang Thong | จิกสังข์ทอง | 10 | 3,999 | ||
| 7. | Dan | ด่าน | 13 | 5,206 | ||
| 8. | Du | ดู่ | 14 | 7,362 | ||
| 9. | Nong Ueng | หนองอึ่ง | 17 | 8,594 | ||
| 10. | Bua Hung | บัวหุ่ง | 18 | 6,822 | ||
| 11. | Phai | ไผ่ | 12 | 5,334 | ||
| 12. | Som Poi | ส้มป่อย | 17 | 7,188 | ||
| 13. | Nong Mi | หนองหมี | 18 | 5,937 | ||
| 14. | Wan Kham | หว้านคำ | 13 | 5,142 | ||
| 15. | Sang Pi | สร้างปี่ | 12 | 4,823 |