82051 (area code: 307)
82063 (area code: 307)
82070 (area code: 307)
82071 (area code: 307)
82072 (area code: 307)
82073 (area code: 307)

Why is zip code data on an environmental science site?
In 2002 I was working on a project that correlated pollution and income for zip codes across the United States. Visitors told me the data files were very useful so I left them on the site and now update the postal information on a periodic basis even though the focus of the site is conservation.

Copyright Rhett Butler 2007

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