In the API documentation, regarding retrieving the county name, I found this line:

"countyName: Name of county the zip code resides."

Since a ZIP code can encompass more than one county, is the service able to account for this and return the correct county? If so, can it do so when the address's provided ZIP code is five digits, or must it include a nine-digit ZIP code to get the absolute correct county?

Thanks,

-Sam

asked 08 Feb, 08:35

samneel's gravatar image

samneel
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A county is a demographic designation used by local government and thus is irrespective of ZIP codes which are basically postal delivery areas. Thus, many 5-digit ZIP codes span multiple counties and even multiple states. This is not the case with a ZIP+4 (or nine digit ZIP code). A ZIP+4 designates a certain location, as small as a single floor in a highrise building or as large as a portion of a city block. ZIP+4 codes always exist only within a single county.

When our LiveAddress API returns the county for an address, we have already performed the necessary address verification on that address to be able to determine the ZIP+4 code. Thus, the county data that we return is always the actual single county in which that address is located.

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answered 08 Feb, 10:19

Jeffrey%20-%20SmartyStreets's gravatar image

Jeffrey - SmartyStreets ♦♦
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accept rate: 50%

Great, that's exactly what I needed. Thanks!

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answered 08 Feb, 12:06

samneel's gravatar image

samneel
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accept rate: 0%

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Asked: 08 Feb, 08:35

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Last updated: 08 Feb, 12:06