This interactive mapping site identifies the location of houses of worship established in Baltimore City before 1900. The information is based on Francis P. O'Neill's "A Guide to Eighteenth- and Nineteenth-Century Baltimore Houses of Worship," which appeared as a series of articles in volumes 49-51 of the Maryland Genealogical Society Journal. The site provides hyperlinks to information on church records at the Maryland State Archives and the LDS Family History Library.

The Archives of the Episcopal Diocese of Maryland holds the church records of baptisms, marriages and burials of churches that have closed. Active churches maintain their own records. Some of the original Episcopal Churches in Maryland have had their records copied by the Maryland State Archives.

The Evangelical and Reformed Historical Society holds a variety of church records for church congregations that originated in the former Reformed (German) Church in the United States, Evangelical (German) Synod of North America, the Evangelical and Reformed Church, and the present United Church of Christ. They have the records of 42 Maryland churches.

The Evangelical Lutheran Church in America (ELCA) Region 8 Archives provides access to records created by ELCA synods and disbanded congregations within these areas: Central Pennsylvania (Allegheny Synod, Upper Susquehanna Synod, and Lower Susquehanna Synod), Delaware and most of Maryland (Delaware-Maryland Synod), and the Washington D.C.-Northern Virginia metropolitan area (Metropolitan Washington, D.C. Synod). It also houses some records from ELCA Region 8 predecessors such as the Central Pennsylvania Synod and the Maryland Synod. The Archives is located in Gettysburg. It prefers email for research requests and provides information on the Web site for making requests.

Findmypast provides access to digitized Catholic parish records from the Baltimore Diocese (which includes churches in the counties of Allegany, Anne Arundel, Baltimore, Carroll, Frederick, Garrett, Harford, Howard, and Washington plus Baltimore City). Findmypast is a subscription site, but you can search these records with just a free account. Other major cities with Catholic records on the site include New York, Philadelphia, Chicago, and Cincinnati.

This list is an inventory of church and cemetery records available on microfilm at the library of the Maryland Center for History and Culture.

Newly reconstituted in late 2013, the Jewish Genealogy Society of Maryland once again is offering educational programs related to Jewish genealogical research.

The Jewish Museum of Maryland is America's leading museum of regional Jewish history, culture and community. Visitors can uncover the roots of Jewish history in the landmark historic sites - the Lloyd Street Synagogue, built in 1845, now the nation's third oldest surviving synagogue and Bânai Israel Synagogue, built in 1876 and still home to a vibrant congregation. The Museum Campus includes three exhibition galleries featuring fascinating and diverse exhibitions that explore in depth, the Jewish American experience. The Museum offers a wide range of programs and special events as well as a research library and family history center.

Considered the mother church of American Methodism, Lovely Lane Museum and Archives offers researchers access to artifacts and art as well as books and monographs on Methodism. The site also offers access to the list of interments in Mt. Olivet Cemetery in Baltimore.

The Library of Congress maintains a listing of local religious archives entitled "Religion Collections in Libraries and Archives: A Guide to Resources in Maryland, Virginia, and the District of Columbia."

The Presbyterian Historical Society collects, preserves, and shares the story of the American Presbyterian experience with Presbyterians, the scholarly community, and the general public.