| Official Name: | Khok Si Suphan |
| Native Name: | โคกศรีสุพรรณ |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: |  Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Sakon Nakhon |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Tong Khop |
| Subdivision Type3: | Tambon |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 33717 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 47280 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 4715 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 17.0436°N 104.2733°W |
Khok Si Suphan (Thai: โคกศรีสุพรรณ, in Thai pronounced as /kʰôːk sǐː sù.pʰān/) is a district (amphoe) of Sakon Nakhon province, northeast Thailand.
The minor district (king amphoe) was created on 5 May 1981, when the three tambons Tong Khop, Lao Phon Kho, and Dan Muang Kham were split off from Mueang Sakon Nakhon district.[1] It was upgraded to a full district on 9 May 1992.[2]
Neighbouring districts are (from the south clockwise) Tao Ngoi, Mueang Sakon Nakhon and Phon Na Kaeo of Sakon Nakhon Province, Wang Yang and Na Kae of Nakhon Phanom province.
The people of Khok Si Suphan are predominantly of Phu Thai and Nyaw ethnicity.
The district is divided into four sub-districts (tambons), which are further subdivided into 52 villages (mubans). There are no municipal (thesaban) areas, and a further four tambon administrative organizations.
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Tong Khop | ตองโขบ | 17 | 12,273 | ||
| 2. | Lao Phon Kho | เหล่าโพนค้อ | 11 | 5,769 | ||
| 3. | Dan Muang Kham | ด่านม่วงคำ | 11 | 7,029 | ||
| 4. | Maet Na Thom | แมดนาท่ม | 13 | 8,646 |