Free ZIP Code Database vs. Commercial Products

ZIP Code Database Alternatives (free & low-cost)

Our sources and verification processes deliver products based on very high standards. We believe most businesses will yield a greater return on investment by choosing a superior product. However, we also understand not every purpose requires this level of quality. Therefore we’d like to suggest alternatives for cases such as these.

Navigating the low-end Market

You can buy repackaged USPS ZIP Code data from several sources for under $50 and often can get it for free. Since free sources tend to come-and-go in any industry, it’s good to have some familiarity. Here are traditionally free sources that GreatData.com considers reputable. Please note, we do not have a relationship with these organizations nor are we responsible their products or service in any way whatsoever.


semaphorecorp.com (ZIP Codes and several other services as well)
boutell.com (a free ZIP Code database resource)
census.gov/geo/www/tiger (free US Census Tiger Data - which is what many low-end 3rd party ZIP Code databases are based on)

Critical Considerations

As mentioned, some free or low-end ZIP Code data is derived from Census data. zcta versus zip code

Watch our ZCTA vs. ZIP Code video.

Others use straight USPS data. It goes without saying, free or low-end data offerings usually can’t bear the overhead of extensive data cleansing (and USPS data is not clean). However, we're already assuming that is acceptable in your case, so lets focus on other things to be on the look-out for.

Informative Resources

usps.gov
census.gov
zipcodereview.com
wikipedia.org/Postal_codes