How to find nearest cities in a given radius?

Question

Do you know some utility or a web site where I can give US city,state and radial distance in miles as input and it would return me all the cities within that radius?

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Answer 1

Oracle, PostGIS, mysql with GIS extensions, sqlite with GIS extensions all support this kind of queries.

If you don't have the dataset look at:

http://www.geonames.org/