The Archdiocese is broken down into three Vicariates, smaller geographic areas within the Archdiocese. In addition, each Vicariate is broken down into regions, all of which are overseen by one the auxiliary bishops.

Eastern Vicariate - view parishes
Auxiliary Bishop: Most Reverend Mitchell T. Rozanski
Geographical Area: Anne Arundel County, Baltimore County, Harford County
Regions within the Vicariate: Anne Arundel Region, East Baltimore County Region, North Baltimore County Region, West Baltimore County Region, Harford Region

Urban Vicariate - view parishes
Auxiliary Bishop: Most Reverend Denis J. Madden
Geographical Area: Baltimore City
Regions within the Vicariate: Harbor East, Harbor West, Metro East, Metro West

Western Vicariate - view parishes
Auxiliary Bishop: Most Reverend W. Francis Malooly
Geographical Area: Allegany County, Carroll County, Frederick County, Garrett County, Howard County, Washington County
Regions within the Vicariate: Central Region, South Central Region, Western Region