Kut Prathai (Thai: กุดประทาย) is a tambon (subdistrict) of Det Udom District, in Ubon Ratchathani Province, Thailand.

[1] Kut Prathai legally gained subdistrict status in 1947.

Previously, it was administered by the district's capital, Mueang Det.

[1][2] The following is a list of the subdistrict's mubans, which roughly correspond to the villages:[2]

This Ubon Ratchathani Province location article is a stub.