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Why Can't I Find a List of Zip Codes, Cities, and States?

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I am working on a demo, and one of the things I dreamed up involves looking up cities based on a zip code, or zip codes based on a state. 

I can't find the data. 

Anyone know of a place where I can download a list of city, state, and zip codes?  Preferably for all 50 states, but even individual state data would be useful.

Comments

  • Anonymous
    June 16, 2006
    Not exactly what you asked for... but kind of close?

    The USPS has an POX like API that looks free to use...

    http://www.usps.com/webtools/address.htm

    ZIP Code™ Lookup
    Find matching ZIP Codes or ZIP+4 Code for any given address, city, and state in the U.S.  

    City/State Lookup
    Get accurate city and state information when you only have the ZIP Code.  

  • Anonymous
    June 16, 2006
    The comment has been removed
  • Anonymous
    June 16, 2006
    By the way, check it this neat project on Sourceforge:

    http://sourceforge.net/projects/zips/
  • Anonymous
    June 16, 2006
    Well, the USPS sells such databases:

    http://www.usps.com/ncsc/addressinfo/addressinfomenu.htm?from=zclsearch&page=ais

  • Anonymous
    June 16, 2006
    The comment has been removed
  • Anonymous
    June 19, 2006
    Why is it that you feel the USPS zip code database is "... something that they should provide for free on their web site?"
  • Anonymous
    June 22, 2006
    You might also look here, I think it's what you were looking for. http://developer.yahoo.com/maps/rest/V1/geocode.html
  • Anonymous
    August 03, 2006

    Kirk Allen Evans' Blog : Why Can't I Find a List of Zip Codes, Cities, and States?.
    Kirk, who’s...