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 8,512 square kilometres (3,287 sq mi) and is the fourth-largest provinces in central Thailand.

This wall served as a defensive line to protect the Ayutthaya Kingdom from what is now modern-day Burma.

As of 26 November 2019 there are:[8] 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).