An amphoe —usually translated as "district"—is the second level administrative subdivision of Thailand. Groups of amphoe or districts make up the provinces, and are analogous to counties. The chief district officer is Nai Amphoe. Amphoe are divided into tambons,, or sub-districts.

Trat province, also spelt Trad province, is one of Thailand's seventy-seven provinces (changwat), and is located in the region of eastern Thailand. It borders Chanthaburi province to the northwest, and Cambodia and its provinces of Pailin, Battamabang, Pursat, and Koh Kong to its north, northeast and east. To the south, it borders the Gulf of Thailand and Pacific Ocean. In Thailand, it is the 15th smallest province at 2,819 km2 and 4th least populated province at 229,958 in 2019. Its capital is Trat town.