Chaiyaphon is a subdistrict (tambon) in Mueang Bueng Kan District, in Bueng Kan Province, northeastern Thailand.

[1] The topography of Chaiyaphon subdistrict is plain and lowland, there are few natural forests and is located in the upper part of Isan.

The Mekong river flows north of the subdistrict.

[2] The administration of ฺChaiyaphon subdistrict (tambon) is responsible for an area that covers 74.12 square kilometres (28.62 sq mi) and consists of thirteen administrative villages (muban).

Chaiyaphon subdistrict is home to the following active temples, where Theravada Buddhism is practised by local residents:[3]