| Official Name: | Krasae Sin |
| Native Name: | กระแสสินธุ์ |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Songkhla |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Krasae Sin |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 16055 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 90270 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 9008 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 7.6183°N 100.3283°W |
Krasae Sin (th|กระแสสินธุ์, pronounced as /th/) is a district (amphoe) in the northern part of Songkhla province, southern Thailand.
Neighboring districts are (from the south clockwise): Sathing Phra of Songkhla Province; Pak Phayun, Bang Kaeo, Khao Chaison, and Mueang Phatthalung of Phatthalung province; and Ranot of Songkhla Province.
The western part of the district is on the shores of Thale Luang and Thale Noi, the northern parts of the Songkhla Lake.
The minor district (king amphoe) was created on 16 February 1978, when the three tambons, Choeng Sae, Ko Yai, and Rong, were split off from Ranot district.[1] It was upgraded to a full district on 4 July 1994.[2]
The district is divided into four sub-districts (tambons), which are further subdivided into 22 villages (mubans). There are no municipal (thesaban) areas within the district; there are a further four tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | |
|---|---|---|---|---|---|
| 1. | Koh Yai | เกาะใหญ่ | 9 | 6,928 | |
| 2. | Rong | โรง | 5 | 3,033 | |
| 3. | Choeng Sae | เชิงแส | 4 | 2,987 | |
| 4. | Krasae Sin | กระแสสินธุ์ | 4 | 3,107 |