List of Catholic dioceses in Thailand

The Episcopal Conference of Thailand is composed of 2 ecclesiastical provinces, each headed by an archbishop, and 9 suffragan dioceses.

Ecclesiastical Province of Bangkok

 * Archdiocese of Bangkok
 * Diocese of Chanthaburi
 * Diocese of Chiang Mai
 * Diocese of Chiang Rai
 * Diocese of Nakhon Sawan
 * Diocese of Ratchaburi
 * Diocese of Surat Thani

Ecclesiastical Province of Thare and Nonseng

 * Archdiocese of Thare and Nonseng
 * Diocese of Nakhon Ratchasima
 * Diocese of Ubon Ratchathani
 * Diocese of Udon Thani