Khiri Mat (Thai: คีรีมาศ, pronounced [kʰīː.rīː mâːt]) is the southernmost district (amphoe) of Sukhothai province, in the lower northern region of Thailand.

[1][2] Neighboring districts are (from the northwest clockwise) Ban Dan Lan Hoi, Mueang Sukhothai and Kong Krailat of Sukhothai Province, Bang Rakam of Phitsanulok province and Phran Kratai of Kamphaeng Phet province.

The district was renamed from Tanot to Khiri Mat in 1939.

[3] The district is divided into 10 sub-districts (tambons), which are further subdivided into 101 villages (mubans).

This Sukhothai Province location article is a stub.