The Archdiocese of Kansas City in Kansas (Latin: Archidioecesis Kansanopolitana in Kansas) is a Latin Church ecclesiastical province, or archdiocese, of the Catholic Church in eastern Kansas in the United States.

The archbishop's episcopal seat is located at the Cathedral Church of Saint Peter in Kansas City, Kansas. The Archdiocese of Kansas City in Kansas is a metropolitan see. Its metropolitan archbishop oversees an ecclesiastical province with three suffragan dioceses: the Dioceses of Dodge City, Salina, and Wichita.

The Archdiocese of Kansas City in Kansas comprises the following counties:

The earliest Catholic presence in present day Kansas was during the 1540s, when Reverend, Juan de Padilla, the Spanish missionary priest, accompanied the Spanish explorer Francisco Vázquez de Coronado on his expedition through the region.

During the 18th century, present day Kansas was under the jurisdictions of Spain and France. The few Catholics in the area were governed by the Diocese of Louisiana and the Two Floridas, based in New Orleans. After the Louisiana Purchase of 1803, Kansas became part of the United States.

The Vatican in 1826 erected the Diocese of St. Louis, which included Kansas and the vast Missouri Territory. During the early 1800s, Catholic missionaries started building chapels for their Native American converts. In 1847, Jesuit priests established the St. Mary's Mission in St. Marys, Kansas, along the Oregon Trail, to evangelize the Potawatomi people.

Pope Pius IX in 1850 erected the Vicariate Apostolic of Indian Territory East of the Rocky Mountains. This huge jurisdiction contained the present-day states of Kansas, Nebraska, North and South Dakota, Colorado, Wyoming, and Montana. The pope named Reverend John Miège from St. Louis as the vicar apostolic.

Miège arrived in 1851 at an Potawatomi encampment on the Kansas River. At that time, his vicariate contained five churches, eight priests, and 5,000 Catholics. He then moved to the Jesuit mission at St. Marys. Miège conducted extensive pastoral visitations throughout the vicariate, visiting Native American villages, forts, trading posts, and growing towns. He would celebrate mass at these stops on the rear end of his wagon.

Miège founded a girls' school for the Osages Nation, placing it under the supervision of the Sisters of Loretto. In 1855, Miège established his episcopal see in Leavenworth, Kansas, in order to better minister to the growing number of Catholic European settlers there.By this time, the vicariate had a Catholic population of 5,000, with 3,000 Native American converts. It was served by eight priests in 11 missions and 18 stations.

In 1857, the Vatican suppressed the Vicariate of the Indian Territory, creating instead the Vicariate of Kansas, including all of Kansas. Miège was made vicar of the new vicariate. The first Catholic church in Kansas City, Kansas, was St. Mary's, founded in 1858. In Topeka, Assumption Parish was the first in that city, starting in 1862. Miège erected an episcopal residence in Leavenworth in 1863. That same year, the Benedictine Sisters founded the Mount St. Scholastica convent in Atchison, Kansas. Miège laid the cornerstone of Immaculate Conception Cathedral in that same city in 1864 and dedicated the cathedral in 1868.

In 1871, Pius IX named Reverend Louis Fink as coadjutor vicar apostolic to assist Miège with his duties. The Vatican allowed Miège to resign as vicar in 1874 so he could pursue other positions in the church. Fink automatically became the second apostolic vicar of Kansas. At the beginning of Fink's tenure in 1874, the vicariate contained 65 priests, 88 churches, 13 parochial schools, and a Catholic population of approximately 25,000.

In 1877, Pope Leo XIII replaced the Vicariate of Kansas with the Diocese of Leavenworth, covering all of Kansas. By 1881, the number of Catholics in the diocese had risen to 60,000. The first Catholic newspaper was founded in Olathe, Kansas in 1882. As the population of Kansas grew, Leo XIII in 1887 erected the Dioceses of Concordia and Wichita, taking territory from the Diocese of Leavenworth. The pope made Fink the first bishop of the new Diocese of Leavenworth. In 1897, the pope moved several more counties from Leavenworth to Concordia. By the time of Fink's death in 1904, the Diocese of Leavenworth had 110 priests, 100 churches, 13 stations and chapels, 37 parochial schools, and 35,000 Catholics.

The second bishop of Leavenworth was Monsignor Thomas Lillis from Kansas City, Missouri, named by Pope Pius X in 1904. During his tenure, Lillis established several new congregations, churches, and parochial schools. In 1910, he became coadjutor bishop of the Diocese of Kansas City (the future Diocese of Kansas City–Saint Joseph in Missouri).

To replace Lillis, Pius X in 1910 named Reverend John Ward of Leavenworth as bishop of that diocese. In 1927, Reverend Francis Johannes from the Diocese of St. Joseph was appointed coadjutor bishop in Leavenworth by Pope Pius XI to assist Ward. When Ward died in 1929, Johannes automatically succeeded him as bishop of Leavenworth. Johannes died in 1937. To replaced Johannes in Leavenworth, Pius XI named Reverend Paul Schulte. In 1946, Schulte became archbishop of the Archdiocese of Indianapolis. Pope Pius XII then selected Auxiliary Bishop George Donnelly from the Archdiocese of St. Louis as the next bishop of Leavenworth.

On May 10, 1947, in recognition of the growth of Kansas City, Kansas, Pope Pius XII renamed the Diocese of Leavenworth as the Diocese of Kansas City in Kansas, with Donnelly remaining as bishop. Donnelly died in 1950. Pius XII then replaced him with Bishop Edward Hunkeler from the Diocese of Grand Island in 1951.

On August 9, 1952, Pius XII elevated the Diocese of Kansas City in Kansas to the Archdiocese of Kansas City in Kansas. The new archdiocese was assigned the suffragan dioceses of Dodge City, Salina (formerly the Diocese of Concordia) and Wichita. Hunkeler was named archbishop of Kansas City in Kansas. Hunkeler retired in 1969 due to health problems.

The second archbishop of Kansas City in Kansas was Bishop Ignatius Strecker from the Diocese of Springfield-Cape Girardeau, appointed by Pope Paul VI in 1969. In 1990, Strecker established background and reference checks for all persons working with children, including employees and volunteers, at the archdiocese as part of a policy to combat sexual abuse of minors. In 1992, Strecker denounced the pro-choice views of State Representative Kathleen Sebelius. He accused Sebelius, a Catholic, of leading "the death-march of the unborn to the abortion clinics in the [Kansas] House of Representatives" and "attempting to make the 'death-marches' to the abortion clinics as legal as the death-marches to the gas chambers of the World War II Holocaust." Strecker retired in 1993.

Pope John Paul II named Bishop James Keleher of the Diocese of Belleville as archbishop of Kansas City in Kansas in 1993. In 1996, Keleher started an education program to fight child sexual abuse in the archdiocese and instituted a background questionnaire for anyone working with children. Keleher established an independent review board in 2002 to investigate and issue recommendations on all allegations of sexual abuse. In 2003, he instituted VIRTUS, a national child abuse prevention program.

In January 2004, John Paul II appointed Auxiliary Bishop Joseph Naumann of St. Louis to serve as coadjutor archbishop for Keleher. In February 2004, Keleher requested that the parishes and Catholic institutions within the archdiocese stop inviting politicians who support abortion rights for women to any events. This request was precipitated by the University of St. Mary in Leavenworth inviting Sebelius to speak there. When Keleher resigned as archbishop in 2005, Naumann automatically succeeded him.

Naumann stated that he tried to persuade Sebelius to change her stand on abortion rights, and after her refusal in doing so, he denied her communion. The archdiocese in 2022 spent $2.45 million in support of an ill-fated proposed amendment to the Kansas constitution to remove its protection of abortion rights, which was defeated by a 59 to 41% margin.

As of 2023, Naumann is the bishop of the Archdiocese of Kansas City in Kansas.

In February 2019, it was announced that the Kansas Bureau of Investigation (KBI) had been investigating sex abuse allegations against the Kansas dioceses since November 2018. On August 14, 2020, Melissa Underwood, spokeswoman for the KBI, stated in an email “As of Aug. 7, we have had 205 reports of abuse and have opened 120 cases.”

John Baptiste Miège (1850–1857), title changed with title of apostolic vicariate

1. John Baptiste Miège (1857–1874)
2. Louis Mary Fink (1874–1877), title changed with elevation to diocese

1. Louis Mary Fink (1877–1904)
2. Thomas Francis Lillis (1904–1910), appointed Coadjutor Bishop of Kansas City in Missouri and subsequently succeeded to that see
3. John Chamberlain Ward (1910–1929)
4. Francis Johannes (1929–1937)
5. Paul Clarence Schulte (1937–1946), appointed Archbishop of Indianapolis
6. George Joseph Donnelly (1946–1947), title changed with title of diocese

1. George Joseph Donnelly (1947–1950)
2. Edward Joseph Hunkeler (1951–1952), elevated to Archbishop

1. Edward Joseph Hunkeler (1952–1969)
2. Ignatius Jerome Strecker (1969–1993)
3. James Patrick Keleher (1993–2005)
4. Joseph Fred Naumann (2005–present)

• James O'Reilly, appointed Bishop of Leavenworth in 1887 (because of his death, did not take effect)
• John Francis Cunningham, appointed Bishop of Concordia in 1898

• Bishop Miege High School – Roeland Park
• Bishop Ward High School – Kansas City
• Hayden High School – Topeka
• Immaculata High School – Leavenworth - closed 2017
• Maur Hill – Mount Academy* – Atchison (until 2003, Maur Hill was all boys and Mount Academy was all girls)
• St. James Academy – Lenexa
• St. Thomas Aquinas High School – Overland Park

* Primary sponsorship comes from Saint Benedict's Abbey and Mount St. Scholastica Monastery.

• Catholic Church by country
• Catholic Church hierarchy
• List of the Catholic dioceses of the United States

• Roman Catholic Archdiocese of Kansas City in Kansas Official Site

39°07′38″N 94°52′27″W / 39.12722°N 94.87417°W / 39.12722; -94.87417