Category:Sanborn maps of Marin County, California

The Sanborn Map Company was a publisher of detailed maps of U.S. cities and towns in the 19th and 20th centuries. The maps were originally created to allow fire insurance companies to assess their total liability in urbanized areas of the United States. Since they contain detailed information about properties and individual buildings in approximately 12,000 U.S. cities and towns, Sanborn maps are invaluable for documenting changes in the built environment of American cities over many decades.

The Sanborn maps are available from the Library of Congress which may have larger collections than are here in Commons. See https://www.loc.gov/collections/sanborn-maps/ for additional materials.