There's very little aluminium (U.S. spelling 'aluminum') produced in the US. http://minerals.usgs.gov/minerals/pubs/commodity/bauxite/mcs-2009-bauxi.pdf gives you some information.

http://www.mbendi.com/a_sndmsg/org_srch.asp?gloc=L62&INDY=SBAUX will give you a list of the big companies in the US that operate in Bauxite (aluminium ore) mining and maybe their websites will show where they operate.

There is a town called Bauxite in Arkansas in the US that is in the centre of a Bauxite mining area.

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