• Sanborn Maps of Maine from the Fogler Library at the University of Maine at Orono
• Maps at the Maine Cultural Building – from the Collections of the Maine State Library and the Maine State Archive
  • Moses Greenleaf Maps
• Library of Congress maps of Maine
• Maine Historical Maps 
  • Part of mainegenealogy.net this search engine allows you to search through 3,997 historical maps from 11 depositories (including ours!) 

If the collection has a digital database or part of its collections available online, the link will be posted below the name. 

Arizona

• Arizona State University Map Collection

California

• David Rumsey Map Center at the Stanford University Library
  • David Rumsey Map Collection Database
• The Huntington Map Collection
  • Kashnor Collection of Early American Maps at the Huntington Library
• UC Berkeley Earth Sciences and Map Library
  • Historical Map Collection Online
• UCLA’s Henry J. Bruman Map Collection
  • Digital Historical Map Collection
• UC Santa Barbara
  • Alexandria Digital Library

Colorado

• The Jerry Crail Johnson Earth Sciences & Map Library at the University of Colorado Boulder

Connecticut

• UCONN Map and Geographic Information Center (MAGIC)
  • MAGIC Historical Map Collection Online
• Yale University Library Map Collection at the Beinecke Library
  • Beinecke Library Digital Collections

Florida

• The Touchton Map Library at the Tampa Bay History Center
  • Touchton Map Library Online Collections
• University of Florida Map & Imagery Library
  • Map & Imagery Library Online Map Collection

Georgia

• Hargrett Rare Book & Manuscript Library at the University of Georgia
  • Historical Maps Database

Illinois

• Newberry Library Map Collection
  • Digital Newberry
• University of Chicago Library Map Collection
  • University of Chicago Library Map Collection Digital Collections
• University of Illinois at Urbana-Champaign Map Library
  • Digital Collections

Iowa

• University of Iowa Maps Collection
  • Map Collections in the Iowa Digital Library

Massachusetts

• Harvard Map Library
  • Harvard Library Digital Collections Maps and Atlases
• Norman B. Levanthal Map & Education Center at the Boston Public Library
  • Levanthal Map & Education Center Digital Collections

Michigan

• John R. Borchert Map Library at the University of Michigan
  • Brochert Map Library Digital Collections
• Michigan State University Map Library

Minnesota

• Historical Map Collection at the James Ford Bell Library at the University of Minnesota
  • Bell Library Historical Map Images

Nevada

• Mary B. Ansari Map Library at the University of Nevada, Reno
  • University of Nevada, Reno Online Digital Collections
  • Nevada and the Great Basin Maps – UNR Online Digital Collections
• University of Nevada, Las Vegas
  • Southern Nevada and Las Vegas: History in Maps

New Hampshire

• University of New Hampshire – Maps and Geospatial Data
  • UNH Digital Maps & Atlases Collection
  • UNH Library Historic USGS Maps of New England & NY

New York

• Cornell University Maps Collection
• New York Public Library Maps Division
  • Lawrence H. Slaughter Collection in NYPL Digital Gallery
  • NYPL Map Division Digital Collections
  • NYPL Digitized Maps from the Collections

Oregon

• Knight Library Map Collection at the University of Oregon

Pennsylvania

• Donald W. Hamer Center for Maps and Geospatial Information – Pennsylvania State University
  • Digital Map Drawer

Rhode Island

• Map Collection at the John Carter Brown Library at Brown University
  • JCB Library Digital Collections

Texas

• Perry Castaneda Library Map Collection at the University of Texas
  • Online collection available at link above
• Virginia Garrett Cartographic History Library at the University of Texas Arlington Libraries Special Collections
  • Cartographic Connections

Washington

• University of Washington Maps Library
  • UW Digital Collections
• Washington State UniversityHistorical Map Collection
  • Early Washington Maps at WSU Libraries Digital Collections

Washington, D.C.

• Library of Congress Geography & Map Reading Room
  • LOC Online Map Collections
  • LOC Online Map Collections Listed by Theme

Wisconsin

• The American Geographical Society Library at the University of Wisconsin, Milwaukee
  • AGSL Digital Collections

British Library Digitized Collection of Maps

List of UK Map Collections from the British Cartographic Society

• Atlascope
  • The Atlascope project brings nearly 100 atlases of Boston and its surroundings into a seamless digital interface.
• Land Catalog
  • An online application through the Bureau of Land Management that lets the public search for Patents, Surveys, Land Status Records, etc.
• Mapping Inequality
  • Interactive maps looking at redlining practices
• NYPL Building Inspector
  •  “This app is the latest in a series of public-facing tools designed by The New York Public Library Labs to extract, correct and analyze data from historical maps.”
• NYPL Map Warper
  •  “The NYPL Map Warper is a tool for digitally aligning (“rectifying”) historical maps from the NYPL’s collections to match today’s precise maps.” 
• USGS mapView
  • Discover geologic maps through the interactive map database.
• USGS topoView
  • Search for topographic maps by using this interactive map database. 

• ArcGIS Storymaps
• Mapmaker Interactive

• Battle of Gettysburg Storymap
  • A Storymap taking the user through a timeline of the battle and the important locations from it. 
• Border Land: The Struggle for Texas, 1820-1879
  • “This project maps sites of conflict between Native Americans and Euro-Americans in Texas from the creation of the First Mexican Republic to the outbreak of the U.S.-Mexico War (1821-1846).”
• Mapping History at the University of Oregon
• Bureau of Land Management Weekly Story Maps

• Native Land
  • “Native Land is a tool that maps out Indigenous territories, treaties, and languages. This tool is not meant to be an official, legal, or archival resource. It is instead a broadly researched and crowdsourced body of information.”
• Whose Land
  • “Whose Land is a web-based app that uses GIS technology to assist users in identifying Indigenous Nations, territories, and Indigenous communities across Canada.” 

• Climate Maps at NOAA –
• GIS at the Center for Disease Control
• Health Map –
• US Census Bureau Maps – Scroll down the page to Maps and Visualizations