Roman Catholic Diocese of Springfield in Massachusetts

Diocese of Springfield in Massachusetts Diœcesis Campifontis
St. Michael's Cathedral
Coat of arms
Location
Country	United States
Territory	Western Massachusetts
Ecclesiastical province	Boston
Metropolitan	Boston
Coordinates	42°06′19″N 72°35′07″W / 42.10528°N 72.58528°W / 42.10528; -72.58528
Statistics
Area	2,822 sq mi (7,310 km2)
Population - Catholics	219,614 [1] (26.5%)
Parishes	79
Information
Denomination	Catholic
Sui iuris church	Latin Church
Rite	Roman Rite
Established	June 14, 1870
Cathedral	St. Michael's Cathedral
Patron saint	Saint Michael
Current leadership
Pope	Francis
Bishop	William Draper Byrne
Metropolitan Archbishop	Seán Patrick O'Malley
Bishops emeritus	Timothy A. McDonnell
Map
Website
diospringfield.org

The Diocese of Springfield in Massachusetts (Latin: Diœcesis Campifontis) is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in Western Massachusetts in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Boston.

The mother church of the diocese is St. Michael's Cathedral in Springfield. As of 2023, the bishop is William Draper Byrne.