The term GeoDomains refers to sites developed around names of geographical areas such as a city, town, state.
Lat Long (www.lat-long.com) This site has geo coordinates for thousands of places.
U.S. Board on Geographic Names (BGN) (geonames.usgs.gov) The U.S. Board on Geographic Names is a Federal body created in 1890 and established in its present form by Public Law in 1947 to maintain uniform geographic name usage throughout the Federal Government.