MapsofthePast.com and SearchforAncestors.com are sources of old county maps. The Library of Congress government website, LOC.gov, also has a collection of photographs of old maps for viewing online.
Maps of the Past sells historical county maps in a range of formats, including paper, canvas and digital downloads. A customer can view the map online before purchase and see the area the map covers on a modern U.S. map. Visitors of SearchforanAncestor.com can browse U.S. historic map collections. To find an old county map on the Library of Congress website, a visitor can search the maps by entering a county name.