Charles John Brown KC*HS (born 13 October 1959) is an American prelate of the Catholic Church who has been serving as an apostolic nuncio since 2012.

Brown was ordained a priest for the Archdiocese of New York by Cardinal John O'Connor on May 13, 1989, in St. Patrick's Cathedral in Manhattan.

In 1994, Brown stayed in Rome to join the CDF staff, where he worked closely with then Cardinal Joseph Ratzinger (who would later become Pope Benedict XVI) for 17 years.

[9] In the Catholic News Agency, Brown said the 'hundreds of young people' in Eucharistic adoration, praying the Rosary, confessing their sins and 'rejoicing in the liberating love of God' is the future of the Church in Ireland.

[16] On April 14, 2021, to begin the yearlong celebrations for the anniversary of 500 years of Christianity in the Philippines, Brown officiated Mass with Cebu archbishop Jose Palma and administered baptism to several children in commemoration of the first baptism that took place in the island of Cebu on April 14, 1521.

[17] Brown was the co-consecrator of the episcopal of Bishop Arnaldo Catalan current Apostolic Nuncio to Rwanda.

In May 2024, Lai Ching-te met Brown, as Philippine nuncio, accompanied by Stefano Mazzotti during the former's inauguration.

Meanwhile, Cardinal Pietro Parolin told Ching-te, the Vatican desires to establish a permanent office in China.