Congress Merge: Data Tables

Congress Merge price guarantee:  once you become a Congress Merge client
your data price will never go up as long as you remain a client.

Postal Service-based congressional zip-to-district table

Capitol version of the congressional zip-to-district table

Congressional information database

Postal Service-based congressional zip-to-district table

 All zip to district tables are range files

We are now offering a very affordable table that matches zip codes to congressional districts for only $450.00 per year. This table is assembled using information from the U.S. Postal Service and is quite accurate, with a margin of error of two to three percent (out of eight gigs of data).  The table, which reflects redistricting in Maine and Texas, is available in text, Access 2000, and dBase IV formats.  The database is updated quarterly and updates are included in the price.  Also included in the price are separate text tables with all the DC contact information for Representatives and Senators, which is updated weekly.  This table is our most popular product.  Call 703-799-1189 to order or send us an email.   Download a sample.

Please see our zip to district Q & A for more information about this table.

Capitol Version of the congressional zip-to-district table

The Capitol version of the congressional zip-to-district table is put together using 15-digit Census Block numbers and zip codes to which a longitude and latitude have been assigned.  It is extremely accurate and a must for organizations that must have pinpoint accuracyBecause of the cost of the elements used in putting this table together, its cost is $4,000.00 per year.  The table, which reflects redistricting in Maine and Texas, is available in text, Access 2000, and dBase IV formats.  The database is updated quarterly and updates are included in the price.  Also included in the price are separate text tables with all the DC contact information for Representatives and Senators, which is updated weekly.  Call 703-799-1189 to order or send us an emailDownload a sample.

Congressional Information Database

Congress Merge maintains a thorough database on members of Congress. For each senator and representative we have:

  • Capitol suite, phone, fax (two House offices won't give out their fax numbers), electronic contact (the majority are web forms -- such as https://forms.house.gov/wyr/welcome.shtml -- instead of regular email addresses), and web site
  • Four top staffers
  • Committee and subcommittee assignments
  • District office information.
  • Biographical data

We update our clients frequently, sometimes daily, to keep their congressional data as current as possible (please see our Update Policy). Updates also are provided on a weekly basis for those clients whose update needs aren't as immediate.  

This database costs $550.00 per year which includes updates (download a sample).  Call 703-799-1189 to order or send us an email.


Sales of all data products are final.


Please call 703-799-1189 send us an email for information about our data tables or download one or more data samples.  (These samples are from the 107th Congress.)

Download Sample Congressional Zip to District Tables: Capitol & Postal Versions
(Access 2000).

Download Text Sample Congressional Zip to District Tables: Capitol & Postal Versions (field names in first row, tab delimited)



Congressional Information data tables update policy
Congress Merge understands that a critical factor in maintaining any database is accurate data. That's why we have an unrivaled update policy:

While Congress is in session all congressional information data clients have the option of receiving a daily update when the following changes occur in:

  • Committee or subcommittee assignments;
  • Office suites;
  • Member status, i.e., a member of Congress leaves office before the expiration of their elected term;
  • Special elections to fill vacant seats;
  • E-mail addresses;
  • Fax numbers;
  • District office information.
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