| Official Name: | Kaset Wisai |
| Native Name: | เกษตรวิสัย |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Roi Et |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Kaset Wisai |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 99024 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 45150 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 4502 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 15.6561°N 103.58°W |
Kaset Wisai (th|เกษตรวิสัย, pronounced as /th/; tts|เกษตรวิสัย, in Lao pronounced as /kā.sèːt wì(ʔ).sǎj/) is a district (amphoe) in southwestern Roi Et province, Thailand.
Neighboring districts are (from the north clockwise): Chaturaphak Phiman, Mueang Suang, Suwannaphum of Roi Et Province; Phayakkhaphum Phisai of Maha Sarakham province; Pathum Rat of Roi Et Province; and Wapi Pathum of Maha Sarakham province.
Originally named Nong Waeng, it was renamed Kaset Wisai in 1939.[1]
The district is divided into 13 sub-districts (tambons), which are further subdivided into 175 villages (mubans). There are two townships (thesaban tambons): Kaset Wisai and Ku Ka Sing. Each covers parts of the same-named tambon. There are a further 13 tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Kaset Wisai | เกษตรวิสัย | 18 | 16,420 | ||
| 2. | Mueang Bua | เมืองบัว | 13 | 8,632 | ||
| 3. | Lao Luang | เหล่าหลวง | 15 | 7,541 | ||
| 4. | Sing Khok | สิงห์โคก | 13 | 7,289 | ||
| 5. | Dong Khrang Yai | ดงครั่งใหญ่ | 13 | 5,957 | ||
| 6. | Ban Fang | บ้านฝาง | 17 | 6,182 | ||
| 7. | Nong Waeng | หนองแวง | 15 | 8,186 | ||
| 8. | Kamphaeng | กำแพง | 12 | 6,447 | ||
| 9. | Ku Ka Sing | กู่กาสิงห์ | 13 | 9,259 | ||
| 10. | Nam Om | น้ำอ้อม | 9 | 5,016 | ||
| 11. | Non Sawang | โนนสว่าง | 14 | 5,385 | ||
| 12. | Thung Thong | ทุ่งทอง | 9 | 5,491 | ||
| 13. | Dong Khrang Noi | ดงครั่งน้อย | 14 | 7,219 |