Donald J. Hying is an American Roman Catholic prelate who is the fourth and incumbent bishop of the Diocese of Gary, Indiana. He was an auxiliary bishop of the Archdiocese of Milwaukee, Wisconsin from 2011 to 2015.
The youngest of six sons, Bishop Hying was born in West Allis, Wisconsin, to parents Albert and Catherine Hying on August 18, 1963. He attended St. Aloysius and Immaculate Heart of Mary grade schools, Brookfield Central High School. Hying received his bachelors degree from Marquette University and his masters degree from St. Francis Seminary.