The Episcopal Diocese of New Jersey forms part of Province II of the Episcopal Church in the United States of America. It is made up of the southern and central New Jersey counties of Union, Middlesex, Somerset, Hunterdon, Mercer, Monmouth, Ocean, Burlington, Camden, Atlantic, Gloucester, Salem, Cumberland, and Cape May. It is the second oldest of the nine original Dioceses of the Episcopal Church. Services began in 1685 at St. Peter's, Perth Amboy, the oldest parish in the diocese. The diocese itself was founded in 1785.

The Episcopal Diocese of Newark is a diocese of the Episcopal Church in the United States of America comprising the northern third of New Jersey in the United States. The Diocese represents the Anglican Communion, of which the Episcopal Church is a province, and presides over Episcopal parishes, missions, outreach ministries and schools in the New Jersey counties of Bergen, Essex, Hudson, Morris, Passaic, Sussex, Warren, and one church in Union County.