Canadian Geographical Names Database - Canada’s authoritative source for all official geographical names and their associated attributes, maintained by Geographical Names Board of Canada.
U.S. Census Gazetteers - Directory of files which provide a listing of all geographic areas for selected geographic area types and include geographic identifier codes, names, area measurements, and representative latitude and longitude coordinates.
JewishGen - Searchable database of Jewish communities, existing and historical, around the world.
Global Gazetteer - Browseable directory of 2,880,532 of the world's cities and towns, sorted by country and linked to a map for each town.
GeoNames - Browseable, searchable, and downloadable directory of over 11 million place names worldwide.
U.S. Board on Geographic Names - Search or browse the USGS databases of foreign, domestic, Antarctic, and undersea names. Or find the individual naming authority for a particular state (or Antarctic region) here.