Chomphu (Thai: ชมพู, pronounced [t͡ɕʰōm.pʰūː]) is a subdistrict in the Noen Maprang District of Phitsanulok Province, Thailand.

It used to be called Ban Sonphu when the locals first settled down as it was surrounded with thick forest and mountains.

After the municipal zoning was made, the area used to be part of Wang Thong District and was called Ban Sonphu.

The main water resource is canal Khlong Chomphu, an important natural attraction and part of Thung Salaeng Luang National Park.

[1] The following is a list of the subdistrict's mubans, which roughly correspond to villages:[2] Original locals migrated from Vientiane or Luang Prabang in Laos to be precise, during the World War II.