Free Online Genealogy Website of the Day – Sanborn Maps

The Sanborn Map Collection is available via the Library of Congress. There are maps available from all 50 states in the US, and DC, as well as Canada, Cuba, and Mexico.

From the website: “The Sanborn Fire Insurance Maps Online Checklist provides a searchable database of the fire insurance maps published by the Sanborn Map Company housed in the collections of the Geography and Map Division. The online checklist is based upon the Library’s 1981 publication Fire Insurance Maps in the Library of Congress and will be continually updated to reflect new acquisitions.

By clicking on the Collection Items link on the site, it displays over 35,000 online maps. Using the filters, you can narrow down the maps by date range and location, such as state and county.

There also are some Articles and essays with detailed information about the maps, including:

  • Introduction to the Collection
  • Sanborn Samplers
  • Sanborn Time Series

To access the site, go to

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