About the Data on GovTrack.us

GovTrack gets its information from a variety of sources. Most of the sources are official government websites that publish structured data which we pull new information from automatically each day.

The sources we use are listed in the following coverage table:

Current Information
(114th Congress through 115th Congress)
Members of Congress Biographical information and committee assignments for current and former Members of Congress is from the congress-legislators project, a community repository we originally developed and help maintain. Photos are sourced from various locations, including the GPO Guide to House and Senate Members, and credited on individual legislator pages.
Bill Status From GPO.gov/FDSys. Updated roughly daily. Legislative activity appears the next business day. Via the congress project. Prognosis scores (predictions of enactment) are from Skopos Labs.
Bill Summaries We display several sorts of bill summaries, including many that we write ourselves. Other summaries are from the Library of Congress’s Congressional Research Service and the House Republican Conference.
Votes From the Senate and House websites. Updated hourly. Missed vote explanations from ProPublica.
Bill Text From GPO.gov/FDSys. Updated daily, but text only becomes available typically 1-3 business days after major action on the bill.
What’s Coming Up Bills: From the Senate website and Docs.House.Gov; Committee Meetings: From the Senate website and Docs.House.Gov. Updated daily.
District Boundaries Congressional district boundaries on the maps are from the U.S. Census Bureau and maps are courtesy of Mapbox (see how we do it).
1989-2014
(101st-113th Congresses)
Bill Status Historical bill status information was obtained from the old THOMAS.gov site prior to its shutdown in 2016.
Votes From the Senate and House websites. (Except House votes in 1989 (101st Congress, 1st Session), see Rosenthal & Poole.)
Bill Text From GPO.gov/FDSys (~2012-) and archived text from THOMAS.gov (1989-~2012). (Also Cato Institute Deepbills for the 113th Congress.)
1973-1988
(93rd-100th Congresses)
Bill Status From THOMAS.gov (see above).
Bill Text From the Statutes at Large on GPO.gov/FDSys (volumes 87-106). Only the text of enacted bills and agreed to concurrent resolutions are available.
Votes From Rosenthal & Poole’s United States Congressional Roll Call Voting Records, 1789-1990, Carnegie Mellon University.
1951-1972
(82nd-92nd Congresses)
Bills From the Statutes at Large on GPO.gov/FDSys (volumes 65-86). Only enacted bills and concurrent resolutions agreed to are available.
Votes From Rosenthal & Poole’s United States Congressional Roll Call Voting Records, 1789-1990 (see above).
1799-1873
(6th-42nd Congresses)
Bills From the Library of Congress’s American Memory Century of Lawmaking collection via the am_mem_law project.
Votes From Rosenthal & Poole’s United States Congressional Roll Call Voting Records, 1789-1990 (see above).
What to use this data?
All of the data behind GovTrack can be freely reused by others for any purpose. See our developer documentation for more information.