- Office of African American
Ministry - Office of Benefits
- Office of Catholic Schools
- Office of Catholic Services Appeal
- Office of Communications
- Office of Diaconate Formation
- Office of Finance
- Office of Hispanic Ministry
- Office of Human Resources
- Office of Lay Ministry Formation
- Office of Parish Pastoral Council
- Diocesan Peace and Social Justice Commission
- Office of Pro-life Activities
- Office of Religious Education
Faith Formation - Office of Stewardship
- Office of Vocations
- Office of Worship
- Office for Youth & Young Adults
- Camp Lawrence
- Catholic Charities
- Catholic Scouting
- Northwest Indiana Catholic
- Tribunal
- Office of African American
Bishop's Office - Former Bishops
Most Reverend Andrew G. Grutka, D.D.
Ordained December 5, 1933
Appointed Bishop of Gary December 29, 1956
Consecrated February 25, 1957
Retired July 9, 1984
Died November 11, 1993
Most Reverend Norbert F. Gaughan, D.D., Ph.D.
Ordained November 4, 1945
Appointed Auxiliary Bishop of Greensburg April 2, 1975
Consecrated June 26, 1975
Appointed Bishop of Gary July 9, 1984
Retired June 1, 1996
Died October 1, 1999
