A frequently updated list of freely available maps online. Occasional dead links, but still a very useful resource.

ProQuest's fire insurance maps of the US, dating from 1867-1970. Digitized, but not in color. All images are for non-commercial use only, as many maps are still under copyright.

NOTE: The State Library of Iowa makes Iowa Sanborn maps available online for anyone with a State Library of Iowa card, see: http://www.statelibraryofiowa.org/services/resources/sanborn-login

ProQuest's fire insurance maps of the US, dating from 1867-1970. Digitized, but not in color. All images are for non-commercial use only, as many maps are still under copyright.

NOTE: The State Library of Iowa makes Iowa Sanborn maps available online for anyone with a State Library of Iowa card, see: http://www.statelibraryofiowa.org/services/resources/sanborn-login

Maps of Iowa, digitized by the University of Alabama.

UI Access only.

NOTE: The State Library of Iowa makes Iowa Sanborn maps available online for anyone with a State Library of Iowa card, seehttp://www.statelibraryofiowa.org/services/resources/sanborn-login