The Diocese of Alexandria in Louisiana is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in central Louisiana in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of New Orleans.
The Diocese of Baton Rouge, is a Latin Church ecclesiastical territory or diocese in the Florida Parishes region of the U.S. state of Louisiana. It is a suffragan in the ecclesiastical province of the Metropolitan Archdiocese of New Orleans. The current bishop is Michael Duca.
The Archdiocese of New Orleans is a Latin Church ecclesiastical division of the Catholic Church spanning Jefferson, Orleans, Plaquemines, St. Bernard, St. Charles, St. John the Baptist, St. Tammany, and Washington civil parishes of southeastern Louisiana. It is the second to the Archdiocese of Baltimore in age among the present dioceses in the United States, having been elevated to the rank of diocese on April 25, 1793, during Spanish colonial rule.
The Diocese of Lake Charles, is a Latin Church diocese of the Catholic Church in southwestern Louisiana in the United States. It is a suffragan see of the metropolitan Archdiocese of New Orleans.
The Diocese of Houma–Thibodaux is a Latin Church ecclesiastical territory or diocese of the Catholic Church in southeastern Louisiana. It covers Terrebonne, Lafourche, and the eastern part of St. Mary parishes, Morgan City, and Grand Isle in Jefferson Parish. Although a small diocese in terms of area, it has a large Catholic population, with approximately 126,000 Catholics out of a total population of 202,000. The diocese includes part of Cajun Louisiana.
The Diocese of Buffalo is a Latin Church diocese of the Catholic Church in Western New York in the United States. It is a suffragan diocese within the metropolitan province of the Archdiocese of New York.
The Diocese of Lafayette in Louisiana is a Latin Catholic ecclesiastical territory or diocese of the Catholic Church in the United States. It is a suffragan diocese of the Roman Catholic Archdiocese of New Orleans. The diocese was erected by the Vatican in 1918, and its current bishop is J. Douglas Deshotel. Covering St. Landry, Evangeline, Lafayette, St. Martin, Iberia, St. Mary, Acadia, and Vermilion parishes with exception to Morgan City of the Diocese of Houma-Thibodaux), the diocese is divided into four deaneries.
The Diocese of Natchitoches was a Latin Church residential episcopal see of the Catholic Church from 1853 to 1910 and is now a titular see.
The Roman Catholic Diocese of Covington is a Latin Church diocese in Northern Kentucky in the United States. The cathedral church of the diocese is the Cathedral Basilica of the Assumption in Covington.
The Diocese of Springfield–Cape Girardeau is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in southern Missouri in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Saint Louis.
Michael Gerard Duca is an American prelate of the Roman Catholic Church who has been serving as bishop of the Diocese of Baton Rouge in Louisiana since his installation on August 24, 2018. He previously served as the bishop of the Diocese of Shreveport in Louisiana from 2008 to 2018.
Augustus Marie Martin was a French-born prelate of the Roman Catholic Church. He served as the first bishop of the Diocese of Natchitoches in Louisiana from 1853 until 1875.
The Cathedral of Saint John Berchmans is the cathedral church of the Roman Catholic Diocese of Shreveport, in Shreveport, Louisiana, United States. It is one of only eight parish churches in the world dedicated to the Jesuit Saint John Berchmans. In 2016, the cathedral acquired relics of the heart of St. John Berchmans from the Jesuit order in Belgium, displayed in a reliquary near the main altar.
John Clement Favalora is an American prelate of the Catholic Church. He served as archbishop of the Archdiocese of Miami from 1994 to 2010 and as bishop of the Diocese of Alexandria in Louisiana from 1986 to 1989 and as bishop of the Diocese of St. Petersburg in Florida from 1989 to 1994
Anthony Durier was a French-born American prelate of the Catholic Church. He served as the third bishop of the Diocese of Natchitoches in Louisianan from 1885 until his death in 1904.
Cornelius Van de Ven was a Dutch-born American prelate of the Catholic Church. He served as the fourth Bishop of Alexandria in Louisiana from 1910 until his death in 1932. He previously served as bishop of the Diocese of Natchitoches in Louisiana from 1904 until its dissolution in 1910.
John Douglas Deshotel is an American prelate of the Catholic Church who has been serving as bishop of the Diocese of Lafayette in Louisiana since 2016. He served as an auxiliary bishop of the Diocese of Dallas in Texas from 2010 to 2016.
Francis Ignatius Malone is an American prelate of the Roman Catholic Church who has been serving as bishop for the Diocese of Shreveport in Louisiana since 2019.
The Shreveport Martyrs are five Roman Catholic priests who died while caring for strangers afflicted in the 1873 Yellow Fever Epidemic of Shreveport, Louisiana. All five were missionary priests from Brittany, France who came to serve the Diocese of Natchitoches under Augustus Marie Martin They are : Isidore Quémerais of Pleine-Fougères, Jean Pierre of Lanloup, Jean-Marie Biler of Plourivo, Louis Gergaud of Heric, and Francois Le Vézouët of Brélidy.
Jean Pierre was one of five Breton missionary priests to Louisiana who made a sacrifice of their lives in the 1873 Yellow Fever Epidemic in Shreveport, Louisiana. The group is collectively known as the Shreveport Martyrs. On December 8, 2020, Bishop Francis Malone of the Diocese of Shreveport declared him to be a Servant of God, opening the diocesan phase of inquiry into a Cause of Beatification and Canonization. In 2022, the Vatican's Dicastery for the Causes of Saints permitted Father Pierre and the other four Shreveport Martyrs to proceed for consideration as a single Cause. Peter B. Mangum serves as the Episcopal Delegate for the Cause.
United States 
16 parishes of Louisiana 
