St. John the Apostle Catholic Church is within the Diocese of Arlington. From their About-Us/Diocese Page: "The Diocese of Arlington is a thriving community composed of sixty-nine parishes in the Northern Virginia area. Since its founding in 1974, the Diocese has grown significantly, becoming one of the fifty largest dioceses in the United States. Currently there are 464,861 registered Catholics and over 250 priests in the Diocese.

On December 6th, 2016 the Most Reverend Michael F. Burbidge was installed as the fourth bishop of the Diocese, replacing Bishop Emeritus Paul S. Loverde, who had served the area as bishop for over seventeen years."

Proceed to the Catholic Diocese of Arlington website.

According to their About-Us Page, "In late 2004, Virginia’s Catholic bishops founded the Virginia Catholic Conference to represent them and their dioceses of Arlington and Richmond by advocating for public policy that reflects natural law, advances human dignity and serves the common good". Go to the Virginia Catholic Conference website.

The United States Conference of Catholic Bishops (USCCB) is an assembly of the hierarchy of the United States and the U.S. Virgin Islands who jointly exercise certain pastoral functions on behalf of the Christian faithful of the United States. The purpose of the Conference is to promote the greater good which the Church offers humankind, especially through forms and programs of the apostolate fittingly adapted to the circumstances of time and place. This purpose is drawn from the universal law of the Church and applies to the episcopal conferences which are established all over the world for the same purpose." Go to their website.