Diocese of Helena

Diocese of Helena

Dioecesis Helenensis
Cathedral of Saint Helena
Coat of arms
Location
Country United States
Territory Lewis and Clark, Teton, Flathead, Lincoln, Missoula, Sanders, Powell, Granite, Ravalli, Deer Lodge, Silver Bow, Jefferson, Broadwater, Gallatin, Madison, Lake, and Beaverhead counties plus parts of Meagher, Musselshell, and Toole counties in Montana
Ecclesiastical provincePortland
Statistics
Area51,922 sq mi (134,480 km2)
Population
  • Total
  • Catholics
  • (as of 2025)
  • 595,114
  • 48,291 (7.5%)
Parishes57
Schools9
Information
DenominationCatholic
Sui iuris churchLatin Church
RiteRoman Rite
EstablishedMarch 7, 1884
CathedralCathedral of Saint Helena
Patron saintSt. Helena
Current leadership
PopeLeo XIV
BishopAustin Anthony Vetter
Metropolitan ArchbishopAlexander K. Sample
Map
Website
diocesehelena.org

The Diocese of Helena (Latin: Dioecesis Helenensis) is a diocese of the Catholic Church in western Montana in the United States. Erected in 1884, it is a suffragan diocese of the ecclesiastical province of the Archdiocese of Portland in Oregon. The see church is the Cathedral of Saint Helena in Helena.