Paul Richard Gallagher, is a British prelate of the Catholic Church who has been Secretary for Relations with States within the Holy See's Secretariat of State since November 2014. He has worked in the diplomatic service of the Holy See since 1984 and has held the rank of archbishop and apostolic nuncio since 2004, serving as nuncio in Burundi, Guatemala, and Australia.

The Holy See, also called the See of Rome, Petrine See or Apostolic See, is the jurisdiction of the pope in his role as the Bishop of Rome. It includes the apostolic episcopal see of the Diocese of Rome, which has ecclesiastical jurisdiction over the worldwide Catholic Church and sovereignty over the city-state known as the Vatican City. As the supreme body of government of the Catholic Church, the Holy See enjoys the status of a sovereign juridical entity under international law.