Embraces the counties of Boyd, Holt, Merrick, Nance, Boone, Antelope, Know, Pierce, Madison, Platte, Colfax, Stanton, Wayne, Cedar, Dixon, Dakota, Thurston, Cuming, Dodge, Burt, Washington, Douglas, and Sarpy. Founded as the vicariate apostolic of Nebraska on January 6, 1857. Elevated to the diocese of Omaha on October 2, 1885, suffragan of Dubuque. Elevated to an archdiocese on August 4, 1945.

Suffragan dioceses include

See also,