Pope Pius IX created the Diocese of Fort Wayne for Indiana only in 1857, including the Gary area.

[6][7] During the first half of the 20th century, many Catholic immigrants arrived in Indiana from Eastern Europe and Mexico to work in the region's growing steel industry.

[8] The Diocese of Fort Wayne founded several native language parishes near the steel mills to accommodate these immigrants.

During his tenure as bishop, Gaughan ordained three priests and started a diocesan newspaper, the Northwest Indiana Catholic.

The plaintiff stated that Emerson sexually abused him as a minor in Orlando during the late 1980s and early 1990s at St. Charles Borromeo Parish.

[16] The plaintiff in the 2005 case claimed that the Diocese of Gary ignored earlier sexual abuse allegations against Emerson during his first residence in Indiana.

[17] The diocese was sued in 2008 by an Indiana man who claimed that Emerson sexually abused him as a minor in White County.

[18] In July 2010, a second Orlando man sued the diocese, claiming that he had been abused as a 15 year old by Emerson in Florida.

[19][20] In December 2003, Melczek removed Monsignor Don Grass from ministry after he admitted to sexually abusing a preteen girl.

The victim reported the incident to the diocese in November 2003, saying that the crime happened during the 1960's while Grass was assigned to Cathedral of the Holy Angels Parish.

[21][22] The diocese in August 2018 published a list of ten priests with credible accusations of sexual abuse of minors.

Calumet College of St. Joseph[45] – Whiting As of August 2017[update], the only mass in the Extraordinary Form of the Roman Rite in the diocese is offered at the Carmelite Shrine in Munster.

[clarification needed] In 2015, the NWI Latin Mass Community was founded by laity to support and promote the Extraordinary Form in the diocese[citation needed] In 2018, a Solemn High Mass was offered at the Cathedral of the Holy Angels by Auxiliary Bishop Joseph Perry from the Archdiocese of Chicago.

[citation needed] In 2018, the Institute of Christ the King began an apostolate at St. Joseph parish in Hammond, offering the Extraordinary Form on a weekly basis.