The Cathedral Church of St. Paul, Boston is the historic cathedral church of the Episcopal Diocese of Massachusetts. Located at 138 Tremont Street near Downtown Crossing, directly across from Boston Common and Park Street Station, the cathedral is adjacent to the diocesan offices. On April 22, 2018, Amy E McCreath was named the ninth dean and first female dean of the Cathedral Church of St. Paul, and was installed as dean on September 29, 2018. The church, designed by Alexander Parris and Solomon Willard and built in 1819, was the first Greek Revival church in New England, and was designated a National Historic Landmark in 1970 for its architectural significance.

The Episcopal Diocese of Massachusetts is one of the nine original dioceses of the Episcopal Church in the United States of America.