The (Roman Catholic) Diocese of Miao (Dioecesis Miaoensis) in India was created on December 7, 2005 by splitting it from the Diocese of Dibrugarh. It is a suffragan diocese of the Archdiocese of Guwahati. Its first bishop is George Palliparampil. The "Christ, Light of the World" church in Miao is the cathedral of the diocese. The cathedral was built and blessed in 2001.
The diocese covers 4 districts of the state of Arunachal Pradesh - Tirap, Changlang, Lohit and Dibang Valley. Neighboring dioceses are Itanagar and Dibrugarh to the west. To the north and northeast is China, to the south and southeast Myanmar.
The diocese covers an area of 31,445 km². As of 2005, 59,030 of the 420,000 people in the area are member of the Catholic Church. The diocese is subdivided into 1 parish.