|Archdiocese of Kansas City in Kansas|
Archidioecesis Kansanopolitana in Kansas
|Territory||21 Counties in Northeast Kansas|
|Ecclesiastical province||Kansas City in Kansas|
|Area||12,524 sq mi (32,440 km2)|
(as of 2012)|
in 2011: 205,531 (16.8%)
|Established||May 22, 1877 as the Diocese of Leavenworth; May 10, 1947 as the Diocese of Kansas City in Kansas|
|Cathedral||Cathedral of Saint Peter|
St. John Mary Vianney
|Archbishop||Joseph Fred Naumann|
|Emeritus Bishops||James Patrick Keleher|
The Roman Catholic Archdiocese of Kansas City in Kansas (Latin: Archidioecesis Kansanopolitana in Kansas) is an archdiocese of the Latin Rite of the Roman Catholic Church in the United States of America.
The archdiocese was originally established as the Vicariate Apostolic of Indian Territory East of the Rocky Mountains on July 19, 1850 by Pope Pius IX. It was composed of the present day states of Kansas, Nebraska, North and South Dakota, Colorado, Wyoming, and Montana. It lost territory and its name was changed to the Vicariate Apostolic of Kansas in 1857. The vicariate was elevated to the Diocese of Leavenworth by Pope Leo XIII on May 22, 1877. It lost territory in 1887 when the dioceses of Concordia and Wichita were created, and in 1897 when several counties were moved to Concordia. The name of the diocese was changed to the Diocese of Kansas City in Kansas on May 10, 1947 by Pope Pius XII. All of these jurisdictions were in the Ecclesiastical Province of Saint Louis.
The Diocese of Kansas City in Kansas was elevated to an archdiocese by Pius XII on August 9, 1952. The province encompasses the entire state of Kansas and has three suffragan sees, the dioceses of Dodge City, Salina (formerly Concordia) and Wichita.