Chai Prakan (Thai: ไชยปราการ, pronounced [tɕʰāj prāː.kāːn]; Northern Thai: ไจยผาก๋าร, pronounced [tɕāj pʰǎː.kǎːn]) is a district (amphoe) in the northern part of Chiang Mai province in northern Thailand.

Neighbouring districts are (from the south clockwise) Phrao, Chiang Dao, Fang of Chiang Mai Province and Mae Suai of Chiang Rai province.

The Khun Tan Range stretches from north to south along the eastern side of the district. The western tip of the district lies within the Daen Lao Range.

The minor district (king amphoe) Chai Prakarn was created on 1 January 1988, when four tambons were split off from Fang District. It was upgraded to a full district on 4 July 1994.

Chai Prakan is divided into four sub-districts (tambons), which are further subdivided into 44 administrative villages (muban).

There are two sub-district municipalities (thesaban tambon) in the district:

There are two sub-district administrative organizations (SAO) in the district: