Monsignor George Francis Dillon, DD (1836 – 29 January 1893) was a 19th-century Catholic missionary and writer from Ireland.

In 1884, Pope Leo XIII, in recognition of Dillon's services to the church, made him a "Monsignor" and gave him the title "Cameriere Segreto" (Secret Waiter). The title "Cameriere Segreto" made Dillon an official member of the "Famiglia Pontificia" (Pontifical Family). In his final years in Italy, Dillon was assisted by the Passionist Fathers with whom he had cultivated a great friendship.

According to his obituary in The Tablet (issue of 4 Feb 1893, p. 24) Dillon died on 29 Jan 1893 in the "Palazzo di Rossi" located in the Piazza d'Aracoeli in Rome, where he had lived for several years after moving to Italy. However, that may not be altogether correct, as research has not been able to locate a palazzo named "Palazzo di Rossi" in the Piazza d'Aracoeli.[10]

Dillon openly denounced the known collaboration between the Bavarian Illuminati and the Freemasons and the alleged collaboration between Lord Palmerston and the Carbonari. He was also critical of the Alta Vendita document, Napoleon Bonaparte's supposed ties with the Masons and the secretive character of the Fenian organisation.

Generally, most of Dillon's other book releases dealt with religious topics, such as a book about the Virgin Mother of Good Counsel, the Sacred Heart of Jesus and a short piece on Irish history, specifically centred on Irish monasticism.