| Official Name: | Chian Yai |
| Native Name: | เชียรใหญ่ |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Nakhon Si Thammarat |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Chian Yai |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 45827 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 80190 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 8006 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 8.1683°N 100.145°W |
Chian Yai (Thai: เชียรใหญ่, in Thai pronounced as /t͡ɕʰīa̯n jàj/) is a district (amphoe) in the southeastern part of Nakhon Si Thammarat province, southern Thailand.
Neighboring districts are (from the north clockwise): Pak Phanang, Hua Sai, Cha-uat, and Chaloem Phra Kiat.
The minor district (king amphoe) on 1 February 1937 by splitting it from Pak Phanang district. It was upgraded to a full district on 3 November 1947.
The district is divided into 10 sub-districts (tambons), which are further subdivided into 98 villages (mubans). Chian Yai is a township (thesaban tambon) which covers parts of tambons Chian Yai, Tha Khanan, and Thong Lamchiak. There are a further nine tambon administrative organizations (TAO).
|