The Archdiocese of Omaha includes 23 counties in northeast Nebraska: Boyd, Holt, Merrick, Nance, Boone, Antelope, Knox, Pierce, Madison, Platte, Colfax, Stanton, Wayne, Cedar, Dixon, Dakota, Thurston, Cuming, Dodge, Burt, Washington, Douglas, and Sarpy.

[3] In the mid-19th century, the Omaha area was part of the Nebraska Territory, a vast jurisdiction that covered five states in the Northern Plains and the Rocky Mountains.

O'Gorman also worked with the Sisters of Mercy to open Mount Saint Mary's Academy, the first Catholic girls school in Omaha.

During his tenure as bishop, O'Connor introduced the Franciscan Fathers, the Poor Clares, the Religious of the Sacred Heart, the Benedictines, and the Sisters of Providence to the diocese.

Archbishop Jeremiah Harty from the Archdiocese of Manilla in the Philippines was named bishop of Omaha by Benedict XV in 1916.

To replace Harty, Pope Pius XI appointed Reverend Joseph Rummel from the Archdiocese of New York in 1928.

[22][20] The second archbishop of Omaha was Bishop Gerald Bergan of the Diocese of Des Moines, appointed by Pius XII in 1948.

[25] After Bergan retired in 1969, Pope Paul VI selected Auxiliary Bishop Daniel E. Sheehan of Omaha as the next archbishop.

Sheehan led capital campaigns to raise funds for archdiocesan improvements, including a $4.5 million refurbishment of the St. James Center.

[26] His final campaign had a goal of $25 million to build Skutt Catholic High School in Omaha and take care of other capital needs in the archdiocese.

Pope John Paul II in 1993 appointed Bishop Elden Curtiss of the Diocese of Helena as the next archbishop of Omaha.

That same year, Pope Benedict XVI named Bishop George Joseph Lucas of the Diocese of Springfield in Illinois as the fifth archbishop of Omaha.

[4] In October 2010, Lucas suppressed Intercessors of the Lamb, a hermit religious community in Omaha, removing it from any association with the Catholic Church.

Lucas then denied the Intercessors' application and sent the community a list of mandatory reforms to continue as a Catholic organization.

However, when Fiala tried to transfer to the Archdiocese of San Antonio in 1995, officials in Omaha gave him a clean bill of health.

After the alleged assault, the boy had told his story to a school counselor; the archdiocese then removed Fiala from ministry.

[31] In 1997, a housekeeper found pictures and a video of nude boys in the possessions of Reverend Daniel Herek at his rectory in Omaha.

In October 2018, Lucas removed Reverend Francis Nigli, pastor of St. Wenceslas Parish in Omaha, from public ministry.

In November 2018, the archdiocese released the names of 38 priests and other clergy members who have been credibly accused of sexual misconduct, an action requested by the state's top prosecutor.

[32] In a written statement, Lucas wrote,"We acknowledge this report with sorrow, and know that it will cause a great deal of pain.” He continued, "We’re deeply saddened so many innocent minors and young adults were harmed by the church’s ministers.

To victims and their families, I am sorry for the pain, betrayal and suffering you have experienced in the church.”[32] In 2020, Lucas and the archdiocese were sued for $2.1 million by Reverend Andrew Syring, an archdiocesan priest.

He stated that he had suffered defamation of character by being removed from public ministry and placed on a list of priests accused of sexual abuse.