William P. Callahan

His Excellency, The Most Reverend William Patrick Callahan O.F.M. Conv.
Bishop Emeritus of La Crosse
Church	Roman Catholic
Diocese	La Crosse
Appointed	June 11, 2010
Installed	August 11, 2010
Retired	March 19, 2024
Predecessor	Jerome Edward Listecki
Successor	Gerard William Battersby
Orders
Ordination	April 30, 1977 by William Edward Cousins
Consecration	December 21, 2007 by Timothy M. Dolan, Richard J. Sklba, and John J. Myers
Personal details
Born	(1950-06-17) June 17, 1950 (age 73) Chicago, Illinois, US
Previous post(s)	Auxiliary Bishop of Milwaukee and Titular Bishop of Lares (2007–2010)
Motto	Adoramus te Christe (We adore you Christ)

Styles of William Patrick Callahan
Reference style	His Excellency The Most Reverend
Spoken style	Your Excellency
Religious style	Bishop

William Patrick Callahan, OFM Conv. (born June 17, 1950) is an American Catholic prelate serving as Bishop of La Crosse from 2010 to May 2024. He is a member of the Conventual Franciscans.

Callahan previously served as an auxiliary bishop for the Archdiocese of Milwaukee. After Archbishop Timothy Dolan was named Archbishop of New York, Callahan was elected the apostolic administrator of the Archdiocese of Milwaukee, serving until November 14, 2009.