![]() You could compare the 60208 ZIP code to recently introduced "overlay" area codes.Ĭensus TIGER data can get you most of the way to mapping postal addresses to geographies, but you have to be prepared for certain ZIP codes to not have ZCTAs, and as J. For example, my office address is in the ZIP code 60208, but it is in the ZCTA 60201. To accommodate the intense demand for data aggregated by ZIP code, the Census Bureau created ZIP Code Tabulation Areas (or ZCTAs) which are roughly what most people think of as the geography that matches a given ZIP code. They are identifiers for postal delivery routes which are often but not always geographic. Some other answers hint at this, but the caution to keep in mind is that ZIP codes are not geographies on a map.
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