Kamphaeng Phet (Thai: กำแพงเพชร, pronounced [kām.pʰɛ̄ːŋ pʰét]) is a province in upper central Thailand.

It borders the provinces of Sukhothai to the north; Phitsanulok to the northeast; Phichit to the east; Nakhon Sawan to the south; and Tak to the west and northwest, covering over 8,607.49 square kilometres (3,323.37 sq mi) and is the fourth-largest provinces in central Thailand.

As of 26 November 2019 there are:[7] one Kamphaeng Phet Provincial Administration Organisation (ongkan borihan suan changwat) and 25 municipal (thesaban) areas in the province.

Kamphaeng Phet, Pang Makha and Nong Pling have town (thesaban mueang) status.

The non-municipal areas are administered by 64 Subdistrict Administrative Organisations - SAO (ongkan borihan suan tambon).

[1] Kamphaeng Phet was mentioned in crime fiction Sarawat Yai as the backdrop of the whole story.