USGS mapping information geographic names information system ...
Geographic names information system
Contains information about almost 2 million physical and cultural geographic features in the United States. The Federally recognized name of each feature described in the data base is identified, and references are made to a feature's location by state, county, and geographic coordinates.
Geological Survey (U.S.)
Ask USGS maps.
Contains information on printed domestic topographic maps and selected National Imagery and Mapping Agency nautical charts, aeronautical charts, and topographic maps.