Sanborn Fire Insurance Maps: Collections in US

Additional Sanborn Map Links (Selected List)

• Sanborn Fire Insurance Maps (Library of Congress Geography & Map Division). Major collection with on-site use only. 
  • Many of the Sanborns in this collection have been digitized. To access, visit Digital Collections > Sanborn Maps.
• University of California at Berkeley, Maps & Air Photos: Sanborn (Fire Insurance) Maps. Mostly California maps.
  • Union List of Sanborn and Other Fire Insurance Maps. Lists cities and towns, and which institution holds copies of materials (by date). Covers all 50 states, listing holdings, by state.
• Harvard Map Collection of Fire Insurance Maps. (Sanborn and Nirenstein).
• MIT's Sanborn Map Collection (Massachusetts maps) Also has Boston maps.
• Fire Insurance Maps (University of Illinois, Chicago).
• Florida Sanborn Fire Insurance Maps (University of Florida, Map & Imagery Library).
• Checklist of Sanborn Fire Insurance Maps in Branner Library (Stanford University).
• Sanborn® Fire Insurance Maps for Georgia Towns and Cities, 1884-1922 (Digital Library of Georgia). Digitized collection of Sanborn maps in the public domain. Maps are from the University of Georgia Sanborn Map Collection (Maps of Georgia).
• Pennsylvania Sanborn Maps Collection (Penn State Map Library). Covers the state. Print collection almost complete coverage; digital collection is being expanded.
• University of California, Santa Cruz. Santa Cruz County Sanborn maps
• University of Utah Sanborn Maps Collection. Digital collection of Utah cities and towns.
• Cyndi's List of Sanborn Fire Insurance Map Collections. Many states and cities are listed here.

Best place to start: Union List of Sanborn maps.