The following is a list of parishes in the Roman Catholic Archdiocese of Washington. Montgomery County Parishes of the archdiocese located in Montgomery County, Maryland. Upper Montgomery East Deanery Upper Montgomery West Deanery Middle Montgomery County Deanery Lower Montgomery County Deanery Prince George’s County Parishes of the archdiocese located in Prince George's County, Maryland. Upper Prince George’s County Deanery Middle Prince George’s County Deanery Lower Prince George’s County Deanery Southern Maryland Parishes of the archdiocese located in Calvert County, Charles County, and St. Mary's County of Southern Maryland. Calvert County Deanery Charles County Deanery St. Mary’s County Deanery Washington, D.C. Parishes of the archdiocese located in Washington, D.C. Northwest-East Deanery Northwest-West Deanery Northeast Deanery Southeast Deanery References External links Complete Directory of the Archdiocese of Washington W