Donald Joseph Hying (born August 18, 1963) is an American Roman Catholic prelate who is the fifth bishop of the Diocese of Madison, Wisconsin.
He was an auxiliary bishop of the Archdiocese of Milwaukee, Wisconsin, from 2011 to 2015 and bishop of the Diocese of Gary, Indiana, from 2015 to 2019.
On April 25, 2019, he was appointed Bishop of the Diocese of Madison.