Roman Catholic Diocese of Lansing

Diocese of Lansing Diœcesis Lansingensis
St. Mary's Cathedral
Coat of arms
Location
Country	United States
Territory	Counties of Clinton, Eaton, Genesee, Hillsdale, Ingham, Jackson, Lenawee, Livingston, Shiawassee, and Washtenaw
Ecclesiastical province	Detroit
Statistics
Area	6,218 sq mi (16,100 km2)
Population - Total - Catholics	(as of 2004) 1,778,475 227,305 (12.8%)
Parishes	95
Information
Denomination	Catholic
Sui iuris church	Latin Church
Rite	Roman Rite
Established	May 22, 1937 (86 years ago)
Cathedral	St. Mary Cathedral
Patron saint	Blessed Virgin Mary
Current leadership
Pope	Francis
Bishop	Earl Boyea
Metropolitan Archbishop	Allen Vigneron
Bishops emeritus	Carl Frederick Mengeling
Map
Website
dioceseoflansing.org

The Diocese of Lansing (Latin: Diœcesis Lansingensis) is a Latin Church ecclesiastical territory – or diocese – of the Catholic Church located in the south-central portion of Michigan in the United States. It is a suffragan diocese in the ecclesiastical province of metropolitan Archdiocese of Detroit.

The mother church of the Diocese of Lansing is St. Mary's Cathedral in Lansing. As of 2023, the bishop of Lansing is Earl Boyea.