| Official Name: | Su-ngai Kolok |
| Native Name: | สุไหงโก-ลก |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Narathiwat |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Su-ngai Kolok |
| Subdivision Type3: | Tambon |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 69757 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 96120 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 9610 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 6.0294°N 101.9661°W |
Su-ngai Kolok (th|สุไหงโก-ลก, pronounced as /th/) is a district (amphoe) of Narathiwat province, southern Thailand.
The minor district (king amphoe) was created on 2 January 1948, consisting of the three tambons: Su-ngai Kolok, Puyo, and Pase Mat from Su-ngai Padi district and Muno from Tak Bai district.[1] In 1953 it was upgraded to a full district.[2]
Neighboring districts are (from the southwest clockwise) Waeng, Su-ngai Padi and Tak Bai. To the southeast is the state Kelantan of Malaysia.
The main water resource is the Kolok River.
The district is divided into four sub-districts (tambons), which are further subdivided into 19 villages (mubans). Su-ngai Kolok itself has town (thesaban mueang) status and covers most parts of the same-named tambon.
| No. | Name | Thai name | Villages | Pop. | |
|---|---|---|---|---|---|
| 1. | Su-ngai Kolok | สุไหงโก-ลก | 1 | 38,756 | |
| 2. | Pase Mat | ปาเสมัส | 7 | 16,765 | |
| 3. | Muno | มูโนะ | 5 | 8,553 | |
| 4. | Puyo | ปูโยะ | 6 | 5,683 |