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Political Science Data Services : U.S. Congress Data


Study of the U.S. Congress is one of the most quantitative areas in political science, and a wide variety of datasets exist.

Roll-Call Voting Data

Roll Call Voting Data

Since Roll Call voting is so central in Congress (that is, votes cast on the floor of the House or Senate) There are a lot of available datasets on this.


Washington Post

Charles Stewart's Congressional Data Page (Congressional Committees, Congressional Election Candidates, Voting Scores)

Election Data (Citizens Voting in Congressional Races)

UC Davis Congressional Election Study   (Additional information here)

CCES - Cooperative Congressional Election Study

Congressional Bills Project  This is a compendium/link site covering a wide variety of congressional data sets.

Senate Action on Cloture Motions

Clerk of the House



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