The dioceses of Kengtung, Loikaw, Pekhon and Taungngu are suffragans of the archdiocese.

When the diocese was elevated to become an archdiocese and metropolitan see on January 17, 1998, Kentung (from Mandalay) and Loikaw and Taungoo (from Yangon) were assigned to the new ecclesiastical province.

The Diocese of Pekhon was created on December 15, 2005, by splitting off the southern part of the archdiocese.

After the split, the archdiocese has 7,350 Catholics out of a total population of 1.5 million.

It covers an area of 26,850 square kilometres (10,370 sq mi).