Maryland Land Records: MDLANDREC
The Maryland Judiciary, the 24 elected Court Clerks of Maryland and the Maryland State Archives have joined in partnership to provide up to date access to all verified land record instruments in Maryland.
Archives of Maryland Online: Land Records
Among this collection of material related to land records are Provincial
Court Land Records that include land records from the 1700s.
David Rumsey Map Collection
The David Rumsey Map Collection is an extensive online global map collection. There are over 440 Maryland maps included.
Happy Map-Maker's Website
This site focuses principally on mapping of early patents and land grants in central Maryland, and also provides additional Maryland genealogy research aids, including search aids for Baltimore City and Baltimore County records.
Library of Congress
The Library of Congress has over 1,200 images of Maryland maps online. Use the search feature to drill down to specific counties or communities.
Maryland Historical Mapping
Information on Maryland land records, tax records, maps, and other geography-based sources for Maryland.
Maryland State Department of Taxation (SDAT) Real Property Data Search
When researching a known address, start your land title research here.
Medusa
Medusa is the Maryland Historical Trust's online database of architectural and archaeological sites and standing structures and includes an online mapping component.
MERLIN Online
Maryland's Environmental Resources and Land Information Network (MERLIN) allows users to research and produce a custom map of any location in Maryland, including their choice of base maps and data layers.
Newberry Library Atlas of Historical County Boundaries
This site provides data on the changing county boundaries of all 50 states, allowing you to confirm what county records to search for any locality at a given date. Particularly helpful are the interactive maps documenting boundary changes.