Maryland
- History
- 1895 U.S. Atlas: Maryland
- African-American Heritage on Worcester County
- Allegany County Historical Society
- Archives of Maryland Online
- Archives of Maryland Government Publications
- Baltimore Album Quilt Tradition
- Baltimore Architecture: Then and Now
- Baltimore City Nineteenth-Century Photos
- Baltimore County Historical Society
- Baltimore County Legacy Web
- Baltimore County Legacy Web - Baltimore Magazine (1917-1928)
- Baltimore County Legacy Web - Historically African-American Communities Photograph Collection
- Baltimore County Public Library History & Genealogy InfoCenter
- Bibliographical Resource Guide to Prince George's County, Maryland Historical Literature
- Calvert County Historical Society
- The Capital & the Bay
- Catonsville Historical Society
- Census Online: Maryland
- Central Maryland Heritage League
- City Directories: Maryland
- Cyndi's List of Genealogical Sites on the Internet: Maryland
- Early Frederick County
- Early Maryland
- Emmitsburg Area Historical Society
- Garrett County Historical Society
- Google: Maryland - History
- Historic Annapolis Foundation
- Historic Towson Inc.
- Historical Society of Carroll County
- Historical Society of Cecil County
- Historical Society of Frederick County
- Historical Society of Harford County
- Historical Society of Kent County
- Historical Society of Talbot County
- History of Brandywine
- History of Chesapeake Beach & Seaside Amusement Park
- History of University Park
- HometownAnnapolis Living History
- Howard County Historical Society
- Jewish Museum of Maryland
- Laurel Historical Society
- Maryland Cemeteries
- Maryland Census Records
- Maryland Civil War Map of Battles
- Maryland Firsts
- Maryland Historical & Biological Series
- Maryland Historical Society
- Maryland Historical Trust
- Maryland in Focus: Photographs of Maryland, 1845-1970
- Maryland Obituary Links
- Maryland Regimental Histories
- Maryland State Archives
- Maryland State Archives Library
- Maryland Tornadoes, 1950-1995
- Maryland Units in the Civil War
- Maryland's National Register Properties
- MDGenWeb
- Medical Care in the City of Baltimore, 1752-1919
- Montgomery County Archives
- Montgomery County Historical Society
- More Than Meets the Eye: History of Maryland Through Prints, 1750-1900
- National Museum of Civil War Medicine
- Obsolete Maryland Currency
- Ocean City Life-Saving Station Museum
- Peerless Rockville
- Penny Postcards from Maryland
- Preservation Maryland
- Prince George's County Directory - 1878
- Prince George's County Historical & Cultural Trust
- Prince George's County Historical Society
- Prince George's County Tricentennial
- Province of Maryland
- Rising Sun History
- Silver Spring Historical Society
- Southern Maryland Studies Center
- Washington County Historical Society
- Western Maryland Heritage Foundation
- Wicomico Historical Society
- Yahoo!: Maryland - History