The Diocese of Piazza Armerina (Latin: Dioecesis Platiensis) is a Latin Church diocese of the Catholic Church in Sicily. It is a suffragan of the archdiocese of Agrigento.

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The diocese of Piazza Armerina was taken from the diocese of Catania, and was created in 1817. It was then a suffragan of the archdiocese of Siracusa. Its first bishop was Girolamo Aprile e Benso. In 2013, in the diocese of Piazza Armerina there was one priest for every 1,588 Catholics.

• Girolamo Aprile e Benso † (2 Oct 1818 – 1836 Died)
• Pietro Naselli, C.O. † (15 Feb 1838 – 13 Jul 1840 Resigned)
• Pier Francesco Brunaccini, O.S.B. † (17 Jun 1844 – 24 Nov 1845) Appointed, Archbishop of Monreale
• Cesare Agostino Sajeva † (19 Jan 1846 – 1867 Died)
• Saverio Gerbino † (23 Feb 1872 – 14 Mar 1887 Appointed, Bishop of Caltagirone)
• Mariano Palermo † (14 Mar 1887 – 9 Feb 1903 Died)
• Mario Sturzo † (22 Jun 1903 – 12 Nov 1941 Died)
• Antonino Catarella † (10 Jan 1942 – 29 Oct 1970 Retired)
• Sebastiano Rosso † (18 Nov 1970 – 8 Jan 1986 Retired)
• Vincenzo Cirrincione † (8 Jan 1986 – 12 Feb 2002 Died)
• Michele Pennisi (21 Apr 2002 – 8 Feb 2013) Appointed, Archbishop of Monreale
• Rosario Gisana (2014 – )

• (in Italian) Official page

 This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). "Diocese of Piazza Armerina". Catholic Encyclopedia. New York: Robert Appleton Company.

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