The Census assigns an area to a ZCTA according to census blocks (the smallest geographic unit used by the census). Imagine a city blockthat makes up a typical census block as pictured to the right. It is bounded on all 4 sides by portions of city streets that each have their own nameand addresses. The issue is that census blocks almost always split down the middle of the street. ZIP codes rarely do because that would requiretwo postal workers delivering mail to that street - one for each side of the street. In the example, one mail carrier may deliver to 3 sides of theblock via one ZIP code while another mail carrier delivers mail on the other street in a different ZIP code. When this happens, the Census Bureauwill assign the entire block to a single ZCTA (in this case, 21044) because the census block is the area that is precisely measured.If you are getting very precise (usually a matter of meters, not miles), census block boundaries near the edge of a ZIP code almost always split ZIP codes.
It gets even more complicated when trying to assign a ZIP code to a specific county (as much as 25% cross county lines), congressional district,metro area, time zone, area code, etc. The edges of the boundaries commonly overlap. For the purposes of our free zipcode database by county downloads, we will commonly list either the most common region for the ZIP code or list multiple regions if several exist in the ZIP code.
Free Zip Codes By City Download
For cities, the assignment is somewhat more complicated. USPS does not always use the city in which the ZIP code is located. The assignment ofcities to ZIP codes is more general. The city is usually the name of the main post office. For instance, almost all ZIP codes in St. Louis County inMissouri have a city of Saint Louis when they may be more accurately described as the name of a smaller city where they are located.
In 2017, Service Objects provided access to a free downloadable dataset of all US ZIP Codes and Canadian Postal Codes. The dataset is continually maintained and has been extremely popular since we made it available. Today, we are pleased to announce an expanded version of this dataset that now includes geocoordinates for each postal code in the US and Canada.
Our leadership position in contact data quality, with over 4 billion transactions processed to date, allows us to maintain this accurate and up-to-date list of current postal codes. By making this resource freely accessible to all, our goal is to help both our own users and the general public leverage postal and geographic data to improve their business processes. Resources like this are an important part of our service mission, and just one more way that we can help benefit your own business efforts.
There are six types of crosswalk files available for download. The first 3 crosswalk files are used to allocate ZIP codes to Census tracts, counties or Core Based Statistical Areas (CBSA). The last three are used to allocate Census tracts, counties or Core Based Statistical Areas to ZIP codes. It is important to note that the relationship between the two types of crosswalk files is not a perfectly inverse one. That is to say, you cannot use the ZIP to Tract crosswalk to allocate Census tract data to the ZIP code level. For that you would have to use the Tract to ZIP crosswalk file.
We are happy to offer a free Zip Code Database that you can easily and immediately download and use in Excel, Microsoft Access, SQL, or any other CSV compatible program. The database is produced from USPS Zip Code Data.
In addition, our database also includes latitude and longitude data that specifies the centroid of each Zip Code to four decimal places. The data is free to use for personal use and you can always return to download the latest update.
ZIP Code data for years 1998, 2001, and 2004 through 2020 are available as single Zip files containing all State Excel files. The files are compressed using the WinZip utility and must be downloaded and extracted before viewing or loading into any application. A free WinZip utility is available, if needed.
There are lots of UK weather stations stored in our database. In our experience, searching for city name and country name together works well (e.g. "London, UK"). You can also search for UK postcodes.
And of course you can download heating and cooling degree days for locations worldwide through our free website. If you've not done so already, why not head back up to the top of this page and give it a go?!
You can download over 100 FREE pdf maps of the USA on this page. USA 3-digit zip code maps and USA County Boundaries maps for each of the states in America. The maps are free to download and use for your own use. Some may have a watermark on the map and some may have a button on the map that invites you to try our online mapping tools. If you find the maps useful just give the system a try(completely free of charge) and see what you think.
For Canadian postal codes, install the trial and click on the Account button on the CDXZipStream commandbar in Excel. Then select the option to download the Canadian database. If you decide to purchase the software, the Canadian database must be purchased separately. CDXZipStream also supports additional international databases such as Mexico, India and Western European countries that substitute for the main US zip code database.
Want to learn more about this template and how it's built? The first video above is the FREE TechHelp version of the template and shows how to work with a single city/state for a ZIP code. Click on the download link to get a copy of the FREE template created in the video.
Our sales tax database includes the latest sales tax rates, broken down by city, county, and zip code, a breakdown of how the total sales tax rate is distributed among the various local taxing jurisdictions, plus useful demographic data, all prepared in Excel and database compatible CSV format. You can purchase a downloadable copy of our database for any or all states here. 2ff7e9595c
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