Table of Contents

Getting Started

What you can do with GeocodioSpreadsheet formattingFile formatsFile sizesIntersectionsAddress completionPreviewing your spreadsheetReverse geocoding

Congressional Districts & Contact Info

With Geocodio, you can upload a list of addresses, coordinates, or ZIP codes and receive the Congressional district information.

Congressional districts have been updated to reflect redistricting.

Simply select "Congressional Districts" in Step 3 of the upload process.

The following data points are returned:

  • Congressional district
  • Congress number (ex., 118th)
  • (For the current congress) Senator/Representative name, email, website, and more. See below.

It is also possible to append districts for the following previous Congresses:

  • 113th Congress
  • 114th Congress
  • 115th Congress
  • 116th Congress
  • 117th Congress

Redistricting: Congressional districts are up-to-date to reflect redistricting. We continue to monitor court cases and map adjustments. See our redistricting 2020 page for more information.

OCD-IDs: Open Civic Data Division Identifiers (OCD-IDs) are a new data inclusion with the 118th Congress.

Special District Numbers: Per U.S. Census Bureau specifications, the following rules apply:

  • States with a single congressional district (i.e. Vermont), will return special District Number: 0.
  • Districts with non-voting delegates (i.e. Washington DC) will return special District Number: 98.
  • For more information, check out this article.

Download an example

Address to Congressional district Coordinates to Congressional district
Example of the results when you add Congressional districts to a list of addresses
Download CSV
Example of the results when you add Congressional districts to a list of latitude/longitude coordinates
Download CSV

Finding Congressional districts via ZIP codes

Due to the irregular shape of Congressional districts, we strongly recommend using street addresses or coordinates if you have them.

If you only have ZIP codes, we will return likely districts. For spreadsheet uploads, we will return the most likely district (i.e. the Congressional district with the greatest amount of overlap with that ZIP code). In the API, we will return all of the possible Congressional districts, ranked by overlap. See more here.

Data options

You can opt to receive just the districts or also the contact and biographical information for each Senator and Representative. The Senator and Representative information is included in the lookup cost for Congressional districts.

Select "Add legislator data" under "Congressional districts" in Step 3 of the upload process.

We only provide legislator information for the current Congress.

Data dictionary

  • First and last name
  • Birthday
  • Gender
  • Party
  • Website
  • DC address
  • Phone number
  • Contact form URL
  • Twitter handle
  • Facebook URL
  • YouTube username
  • YouTube ID
  • Bioguide ID
  • Thomas ID
  • OpenSecrets ID
  • LIS ID
  • GovTrack ID
  • VoteSmart ID
  • BallotPedia ID
  • Washington Post ID
  • Wikipedia ID

Note: Some fields may be unavailable for certain legislators. (For example, not all legislators have a YouTube channel.)


Requests are billed as geocode + Congress info (i.e., two lookups). For example, if you have 100 addresses that you want Congressional contact information for, that would count as 200 lookups.

You can calculate how much this will cost you and how long it will take here.

API to add Congressional districts and Senator/Rep info

You can also get Congressional districts back to the 113th Congress via both our API (go to API docs) and spreadsheet upload. (We do not support historical legislator information.)


Congressional district boundaries are sourced from the U.S. Censusus Bureau as well as individual states when necessary.

Legislator data is sourced from the United States project on Github, an open source project maintained by journalists.

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