| Official Name: | Mai Kaen |
| Native Name: | ไม้แก่น |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Pattani |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Sai Thong |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 11269 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 94220 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 9408 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 6.61°N 101.6672°W |
Mai Kaen (Thai: ไม้แก่น, in Thai pronounced as /máːj kɛ̀n/) is the southeasternmost district (amphoe) of Pattani province, southern Thailand.
The minor district (king amphoe) Mae Kaen was formed on 15 November 1973 by splitting the two tambons Sai Thong and Mai Kaen from Sai Buri district.[1] On 4 July 1994 it was upgraded to a full district.[2]
Neighboring districts are (from the south clockwise): Mueang Narathiwat and Bacho of Narathiwat province and Sai Buri of Pattani Province. To the east is the Gulf of Thailand.
The district is divided into four sub-districts (tambons), which are further subdivided into 17 villages (mubans). There are no municipal (thesabans). There are three tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | |
|---|---|---|---|---|---|
| 1. | Saithong | ไทรทอง | 5 | 4,369 | |
| 2. | Mai Kaen | ไม้แก่น | 4 | 1,822 | |
| 3. | Talo Kraithong | ตะโละไกรทอง | 4 | 2,331 | |
| 4. | Donsai | ดอนทราย | 4 | 2,747 |