Congressional District by ZIP Code

Includes Representatives and Coverage Percentage per ZIP

This product provides a current listing of 117th Congressional Districts by ZIP Code. Since ZIP Codes may span more than one Congressional District, we include an estimated coverage percentage. For example, a ZIP Code may cover 80% of one district and 20% of another. The foundation of this product is true commercial grade ZIP Code data. 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.

Note: If you’re familiar with this data, you’ll know that all providers start with a database from the U.S. Postal Service which contains substantial inaccuracies at times. Rest assured, we have processes in place to catch and override these inaccuracies. Please contact us if interested in further info.

The following files are included with this product:

Districts-full - Congressional District by ZIP Code with corresponding district information.
Reps-full - Congressional Representative name and contact information.

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

Database Specs

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.


Primary City for this ZIP Code


Primary county for this ZIP Code.


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 district).

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’.

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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Related Links

Congressional Districts ZIP + 4   (broken down by 9-digit ZIP Code)