Land Ownership Maps
These maps of counties and towns from the mid-nineteenth to early twentieth century show who actually owned property. Now available online through Ancestry.
Sanborn Map Collection Available through Cornell or a local public library
A collection of historic fire insurance maps. Detailed maps of thousands of localities in the US over successive years.
Cornell Library Map Collection
Located in the lower level of Olin Library. About 250,000 maps, many historic. Website includes many freely available online mapping tools and sources.
Deeds, Patents, and Land Records
Useful explanation. To locate persons who homesteaded or took out land patents:
Note: Resources marked with are restricted to subscribers, either through Cornell University or your local public library.