Prasat (Thai: ปราสาท, pronounced [prāː.sàːt]) is a district (amphoe) in the southern part of Surin province, northeastern Thailand.

Neighboring districts are (from the north clockwise): Mueang Surin, Lamduan, Sangkha, Kap Choeng, and Phanom Dong Rak of Surin Province; Ban Kruat, Prakhon Chai, Phlapphla Chai, and Krasang of Buriram province.

It was split off as a separate district on 4 March 1938, consisting of the seven tambons: Kang Aen, Bakdai, Ta Bao, Prue, Thung Mon, Phlai, and Thamo.

[1] Prasat district is divided into 18 sub-districts (tambons), which are further subdivided into 241 administrative villages (mubans).

This Surin Province location article is a stub.