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States to Regions (Python recipe) by Jackson Killian
ActiveState Code (http://code.activestate.com/recipes/580661/)

Python dictionary mapping two letter state abbreviations to their respective regions of the country (i.e. Midwest, North East, etc.) N - North East W - West M - Mid West S - South O - Other

Python, 59 lines
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states = {
        'AK': 'O',
        'AL': 'S',
        'AR': 'S',
        'AS': 'O',
        'AZ': 'W',
        'CA': 'W',
        'CO': 'W',
        'CT': 'N',
        'DC': 'N',
        'DE': 'N',
        'FL': 'S',
        'GA': 'S',
        'GU': 'O',
        'HI': 'O',
        'IA': 'M',
        'ID': 'W',
        'IL': 'M',
        'IN': 'M',
        'KS': 'M',
        'KY': 'S',
        'LA': 'S',
        'MA': 'N',
        'MD': 'N',
        'ME': 'N',
        'MI': 'W',
        'MN': 'M',
        'MO': 'M',
        'MP': 'O',
        'MS': 'S',
        'MT': 'W',
        'NA': 'O',
        'NC': 'S',
        'ND': 'M',
        'NE': 'W',
        'NH': 'N',
        'NJ': 'N',
        'NM': 'W',
        'NV': 'W',
        'NY': 'N',
        'OH': 'M',
        'OK': 'S',
        'OR': 'W',
        'PA': 'N',
        'PR': 'O',
        'RI': 'N',
        'SC': 'S',
        'SD': 'M',
        'TN': 'S',
        'TX': 'S',
        'UT': 'W',
        'VA': 'S',
        'VI': 'O',
        'VT': 'N',
        'WA': 'W',
        'WI': 'M',
        'WV': 'S',
        'WY': 'W'
}

I spent some time looking for this and wish it had existed. Can be handy if you are ever working with national data at the high level.

Tags: dictionary, regions, states