1903
June 19 - Pope Leo XIII creates the New Diocese of Baker City, 18 counties east of the Cascade Range.
1903-1918
Bishop Charles J. O'Reilly appointed Founding Bishop.
1918-1950
Bishop Joseph Francis McGrath appointed second Bishop.
1948-1950
15 July 1948 - Bishop Leo Fabian Fahey appointed Coadjutor.
1950-1971
12 September 1950 - Bishop Francis P. Leipzig appointed third Bishop.
1951
Due to Baker City changing its name, the Diocese name was changed to Baker Diocese.
1953
Golden Jubilee of the Baker Diocese was held on April 7, 1953.
1971-1999
30 June 1971 - Bishop Thomas J. Connolly appointed fourth Bishop of the Diocese of Baker.
1987
The diocesan camp programs were initiated to create opportunities for all age grouops to come together and learn more about themselves and their faith through workshops, prayer experiences, the Liturgy, crafts, service projects, the Sacrament of Reconciliation and much more. These retreat created an environment where people could explore and learn more about their faith in community with other Catholics. The retreat programs have grown to meet the needs of elementary, junior high, high school youths and their families.
Diocesan Chancery moved from Baker to Bend.
1990
City of Baker renamed Baker City.
2000
Bishop Robert F. Vasa appointed fifth Bishop of the Diocese of Baker.
2003
Diocese of Baker celebrated its 100th Anniversary.
2007
Announcement of plans for the Catholic Center & Retreat/Camp Facility near Powell Butte.
2008
September - Site work and construction begins.
2009
5-6 September - Labor Day weekend, the Diocese celebrated the Dedication Mass of St. Mary Chapel along with the Grand Opening of the new Diocesan Retreat Center. Events began within one week.
2011
24 January - Bishop Vasa appointed Coadjutor Bishop of Santa Rosa.
30 June - Bishop Vasa appointed Bishop of Santa Rosa.
2011-2012
24 January - Bishop William S. Sklylstad appointed Apostolic Administrator to the Diocese of Baker.
His appointment lasted 15 months.
2012
08 March - Reverend Liam Cary, of the Archdiocese of Portland, appointed Bishop-elect of the Diocese of Baker.
18 May - Reverend Cary ordained seventh Bishop of the Diocese of Baker at St. Francis of Assisi Catholic Church in Bend.
2017
January - The Chancery Office was relocated to Redmond, Oregon.