The minor district (king amphoe) was created on 5 May 1981, when the three tambons Mae Pao, Mae Tam, and Mai Ya were split off from Thoeng district.[1] It was upgraded to a full district on 12 August 1987.[2]
Etymology
The district is named after King Mengrai, the founder of the Lanna kingdom of northern Thailand.
Economy
Tambon Phay Mengrai is the site of a 2,700 rai Cavindish banana plantation owned and operated by the Chinese firm, Hongta International, a major local employer. The Cavendish banana is controversial as its cultivation requires the intensive use of chemical pesticides to yield harvests for export.[3] The Mekong-Lanna nature conservation network has accused the Chinese plantation of heavy use of pesticides and excessive water takings from Mae Ing Creek. These charges are as yet unsubstantiated (2016).[4]
Administration
The district is divided into five sub-districts (tambons), which are further subdivided into 69 villages (mubans). Phaya Mengrai is a township (thesaban tambon) which covers parts of tambons Mengrai and Mae Pao. There are a further five tambon administrative organizations (TAO).
