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113th Congressional Districts by ZIP

Congressional Districts by ZIP Codes image This product provides a current listing of 113th Congressional Districts by ZIP Code. Sometimes a ZIP Code spans more than one Congressional District so we include an estimated coverage percentage (Exam. A ZIP Code may cover 80% of one Congressional District and 20% of another). The foundation of this product is true commercial grade ZIP Code data. From there we utilize multiple sources – including our own plotting when necessary – to obtain a complete and accurate Congressional District by ZIP Code relationship. Plus, we add some extras such as congressional representatives by name, primary county, primary city, etc.

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Congressional Districts by ZIP Code

The product associates a 5-digit ZIP Code to one or more Congressional Districts. About 15% of ZIP Codes have more than one district.

The following files are included with this product:
Districts-fullContains a Congressional District by ZIP Code with corresponding congressional district information.
Reps-fullContains the names of each congressional representative corresponding to their district.

Learn more: View the Congressional District by ZIP Code Product Documentation   /   Watch our Accuracy Matters video

Database Sources

We are licensees of USPS database products, but we enhance our database based on decades of experience to provide you with the most accurate product available.

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Cannot be resold, transferred, or used to compete with GreatData.com (as outlined in our license agreement).

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Database Specs & Features


  • Immediate Download

    Download is available immediately upon purchase and for the duration of the annual subscription.

  • Free FTP (upon request)

    To update your database without human intervention, we can provide you will your own FTP site that you can write a script to access. Just request it after purchase.

  • Quarterly Updates

    A monthly update of this database is not necessary, so we update our database quarterly and recommend that you download quarterly as well.

  • Data Format - CSV

    Comma-Separated Values (CSV) Text File


  • ZIP Code

    Official U.S. Postal Service five digit ZIP Code

  • Congressional District Number

    2-digit Congressional District number. Notes: ‘98’ is used for U.S. territories such as Guam and the U.S. Virgin Islands which have congressional delegates, but not true representatives. Also, if there is only one district for a state (due to low population, such as Alaska), the district ‘99’ will be used.

  • City

    Primary City for this ZIP Code

  • County

    Primary county for this ZIP Code.

  • State

    Official U.S. Postal Service State Abbreviation

  • Sequence Number

    Rank given to ZIPs with more than one district (primary, secondary, etc)

  • Coverage Percentage

    Estimated District coverage percentage (some ZIP Codes span more than one disctrict).

  • Rep. First Name

    Representative's first name may include middle initials.

  • Rep. Last Name

    Representative's last name may include a suffix such as ‘Jr.’.

  • Rep. Nickname

    Representative's nick name, if applicable.

  • Vacancy Flag

    Contains ‘Y’ if the seat is currently vacant, otherwise ‘N’.

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