• Columbia Gazetteer of North America - 50,000 entries; the most comprehensive encyclopedia of geographical places and features in U.S., Canada, Mexico & the Caribbean 
• Census Atlas of the United States - with more than 700 full-color maps, this is the first general population and housing statistical atlas published by the Census Bureau since 1925! 
• Getty Thesaurus of Geographic Names - Over 1 million geographic names; includes vernacular & historical names. Short, descriptive passages give brief histories of places 
• Geographic Names - US Geological Survey; information about 2 million physical and cultural geographic features in the United States. 
• Geography Network - maps, satellite images, demographic data and other geographic content 
• GNIS - Provides information about almost 2 million physical and cultural geographic features in the United States. 
• Lonely Planet Online - Australian publisher of travel guides aimed at adventurous travelers; user-friendly mini-versions of print guides, complete with interactive maps 
• Map Machine - gigantic collection of all the National Geographic maps in a searchable database 
• National Atlas - of the U.S. Make your own maps, printable maps, interactive maps, articles on the geography of America; large volume of knowledge at your fingertips 
• Perry-Castañeda Library Map Collection -  Easy to use, extensive collection of all kinds of maps covering every area of the world (Univ. Texas/ Austin) 
• Rand McNally - Includes maps, directions, online atlas, and a mileage calculator.