Pathum Rat (Thai: ปทุมรัตต์, pronounced [pā.tʰūm rát]; Northeastern Thai: ปทุมรัตต์, pronounced [pā.tʰu᷇m làt]) is a district (amphoe) in the southwestern part of Roi Et province, Thailand.

Neighboring districts are (from the east clockwise): Kaset Wisai of Roi Et Province; Phayakkhaphum Phisai, Na Dun, and Wapi Pathum of Maha Sarakham province.

The minor district (king amphoe) was created on 15 June 1963, when three tambons, Bua Daeng, Phon Sung, and Non Sawan were split off from Kaset Wisai district.

The Pathum Rat district is divided into eight sub-districts (tambons), which are further subdivided into 101 administrative villages (mubans).

There are three sub-district municipalities (thesaban tambons) in the district: There are six sub-district administrative organizations (SAO) in the district: This Roi Et Province location article is a stub.