Roman Catholic Diocese of Green Bay

Diocese of Green Bay Dioecesis Sinus Viridis
St. Francis Xavier Cathedral
Coat of arms
Location
Country	United States
Territory	Brown, Calumet, Door, Florence, Forest, Kewaunee, Langlade, Manitowoc, Marinette, Menominee, Oconto, Outagamie, Shawano, Waupaca, Waushara and Winnebago counties, Wisconsin
Ecclesiastical province	Milwaukee
Statistics
Area	10,728 sq mi (27,790 km2)
Population - Total - Catholics	(as of 2006) 998,800 369,556 (37%)
Parishes	169
Information
Denomination	Catholic
Sui iuris church	Latin Church
Rite	Roman Rite
Established	March 3, 1868 (156 years ago)
Cathedral	St. Francis Xavier Cathedral
Patron saint	St. Francis Xavier
Current leadership
Pope	Francis
Bishop	David Laurin Ricken
Metropolitan Archbishop	Jerome E. Listecki Archdiocese of Milwaukee
Bishops emeritus	Robert Joseph Banks Robert Fealey Morneau
Map
Website
gbdioc.org

The Roman Catholic Diocese of Green Bay (Latin: Diocesis Sinus Viridis) is a Latin church diocese in the northeast region of Wisconsin in the United States. It is a suffragan diocese of the Archdiocese of Milwaukee. Its mother church is the Cathedral of Saint Francis Xavier in Green Bay.

The Diocese of Green Bay was erected on March 3, 1868, by Pope Pius IX.^[1] The bishop of Green Bay as of April 2023 is David Ricken.