Map of US
Shows county boundary changes for all states as they occurred. Brief descriptions of county formations and boundary changes. Some hi-res historic maps and links to other sites.
Click here.
Maps at NARA of Interest to Genealogists
The National Archives and Records Administration (NARA) has custody of over 5 million maps. Maps and related cartographic records are often useful for genealogical research. They can:
provide important information on place names and localities at the time the maps were created
show changing political boundaries, counties and minor civil subdivisions
sometimes include names of individual land owners or residents.
Click here.
Meyers Gazetteer
Gazetteer of German places about 1871. Foundational for German research.
Click here.