Turn addresses into accurate district data at scale.
Even when the maps just changed.
Match addresses to Congressional districts, state legislative districts, Canadian ridings, and legislator contact information.
Whether you have 500 addresses or 50 million, Geocodio can handle it.
Quickly get all of the data you need in one standard format. Geocode a spreadsheet, integrate our API, or do both!
New: 120th Congress (cd120) Preview Available - Congressional district boundaries for the 120th Congress are now available as a preview via the field append. The data is accurate, though some states may receive updates as final redistricting changes are published. You can track which states have received updates via our redistricting tracker. The default field append continues to use the 119th Congress (cd119).
Unlike most geocoders, Geocodio lets you store the results in your database and doesn't put restrictions on how you use the results. Geocodio is end-to-end designed to take the frustration out of geocoding and data matching. Give it a try — your first 2,500 lookups per day are free.
Data Enrichment
In addition to data enrichment, Geocodio makes it easier to work with address data by automatically standardizing, parsing, and completing addresses. This is especially the case if your address data comes from multiple sources.
District Name
District Name
District Number
District Number
Congress Number
Congress Number
Congress Years
Congress Years
Congressional Districts
Name
name
Birthdate
Birthdate
Gender
Gender
Party
Party
Photo
Photo
Website & Contact Form
Website & Contact Form
DC Address & Phone Number
DC Address & Phone Number
Facebook, Twitter, and YouTube IDs
Facebook, Twitter, and YouTube IDs
Reference IDs (Wikipedia, Thomas, OpenSecrets, etc)
Reference IDs (Wikipedia, Thomas, OpenSecrets, etc)
Senator & Rep. Info (Congress)
Name
name
Party
party
Photo
photo
Contact Information
Contact Information
Biographical Data
Biographical Data
State Legislator Info
State FIPS
State FIPS
Place FIPS
Place FIPS
Census Tract Code
Census Tract Code
Census Block Code
Census Block Code
Census Block Group
Census Block Group
Metro-Micro Statistical Area (MSA)
Metro-Micro Statistical Area (MSA)
Combined Statistical Area (CSA)
Combined Statistical Area (CSA)
Metropolitan Division
Metropolitan Division
Census Data
District Name(s)
District Name(s)
LEA Code
LEA Code
Grade (low)
Grade (low)
Grade (high)
Grade (high)
School Districts
What Our Customers Say
"In elections, we can’t have even a 5% tolerance for error. Geocodio gave us the accuracy we needed to give people the correct information about the election and remind them to vote."
"Geocodio has allowed us to make marriages between data and discover new things. It's simple, fast, and reliable at scale. It's the Rosetta Stone of geographic data."
"Geocodio offers a one-stop shop for Congressional and state legislative districts and legislator information that is complete and easy to work with. Combined with geocoding, this makes Geocodio the best, single-source solution in this space."
"In elections, we can’t have even a 5% tolerance for error. Geocodio gave us the accuracy we needed to give people the correct information about the election and remind them to vote."
"Geocodio has allowed us to make marriages between data and discover new things. It's simple, fast, and reliable at scale. It's the Rosetta Stone of geographic data."
"Geocodio offers a one-stop shop for Congressional and state legislative districts and legislator information that is complete and easy to work with. Combined with geocoding, this makes Geocodio the best, single-source solution in this space."
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Related Resources
Redistricting Tracker
Track the latest redistricting updates for Congressional and state legislative districts.
API Documentation
See how to add Congressional districts, state legislative districts, and Congressional contact information via our API.
How to Add Congressional Contact Info to Addresses & Integrate with MailChimp
This guide walks you through how to take a list of addresses, add Congressional contact information, and integrate with MailChimp.
Convert ZIP Codes to Congressional Districts
Only have ZIP codes? You can still convert them to Congressional districts (with caution).
Make a Map with Congressional Districts
How to turn addresses into a map with Congressional districts overlaid.
Addresses to Canadian Ridings
Working with Canadian addresses? We can convert your addresses or coordinates to ridings (Canadian federal and provincial electoral districts).
Addresses to State Legislative Districts
How to add state house and senate districts to addresses via spreadsheet or API.
By the time you finish reading this page, the Geocodio API will have processed 5.3 million lookups.
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