Ancestry.com states that it has the world's largest consumer DNA database. AncestryDNA offers autosomal DNA test services.

The Ann Arrundell County Historical Society seeks to encourage and inspire present and future generations to preserve and explore the County's history to foster a greater appreciation for our shared legacy.

The Anne Arundel Genealogical Society was established in 1974 to promote genealogical and family history research in Anne Arundel County, and to help its members learn about genealogy and apply that knowledge to their family history research. The Society offers its members a quarterly newsletter, Speaks, and access to additional information on Anne Arundel County genealogy through Readings Online on its website. The Society holds monthly meetings open to the public on the first Thursday of each month at the Severna Park United Methodist Church. The Kuethe Library Historical and Genealogical Research Center, located at 5 Crain Highway, S.E. in Glen Burnie includes the holdings of both the Anne Arundel Genealogical Society and the Ann Arrundell County Historical Society. Although specializing in Anne Arundel County and Maryland material, its more than 4,000 volumes encompass the eastern and central states, as well as some western material. The Kuethe Library holdings are now listed in the Anne Arundel County Public Library catalog.

The Associated Archives at St. Mary's Seminary & University opened in the spring of 2002. Located on the campus of the nation's first Roman Catholic seminary, this program brings together the archives of the Archdiocese of Baltimore (est. 1789), St. Mary's Seminary & University (est. 1791), and the Associated Sulpicians of the United States (U.S. Province est. 1903), making it one of the most significant repositories for records relating to the early history of the Catholic Church in the United States.

The ongoing Maryland State Archives publication series, Archives of Maryland Online, currently provides access to over 471,000 historical documents that form the constitutional, legal, legislative, judicial, and administrative basis of Maryland's government. Online access enables users to research such topics as Maryland's constitutions and constitutional conventions' proceedings, session laws, proceedings of the General Assembly, governors' papers, and military records.

Among this collection of material related to land records are Provincial Court Land Records that include land records from the 1700s.

Edward Arthur presents his family history beginning with immigrant John Pierce Arthur who arrived in the US in 1846. He died seven years later but left a family whose descendants are still in Maryland. Additionally, Ed presents information about Thomas Cashen of Ireland who had several children that settled in Baltimore.

The Agnes Kane Callum Chapter (Baltimore) of the Afro-American Historical and Genealogical Society is a non-profit organization dedicated to encouraging study and research in history and genealogy. Membership is open to Americans of all ethnic groups and focuses on those with particular interest in African-Americans.

This site includes many identified photographs of residents of Baltimore City mostly taken by Baltimore photographic studios. There are also helps for collecting, preserving and dating photographs. The site was created by the late Gary Ruppert.

The Baltimore City Archives - in conjunction with the Maryland State Archives - is the central depository for government records of permanent value for the city of Baltimore.