US Congressional Legislators Database
8,841 members · 1757–2025
Songpo Yang
Boya Postdoctoral Fellow
School of International Studies, Peking University
Assistant Director, PKU Analytics Lab for Global Risk Politics
Political scientist specializing in global governance, elite politics, and AI-driven methods for social science. PhD from Tsinghua University with visiting research at Columbia University. Published in American Political Science Review and International Affairs.
Collaborators
Overview
A comprehensive dataset of 8,841 US Senators and Representatives spanning 268 years (1757–2025) of American legislative history. Built through automated data collection workflows, covering biographical information, education, career paths, party affiliations, and family dynasty networks.
At a Glance
Key distributions from 8,841 Congressional members across 268 years
Party Affiliation Distribution
Party Composition Over Time
Related Research
Selected studies on US political elites and legislative behavior
Legislative Effectiveness in the United States Congress
Volden, C. & Wiseman, A.E.
Journal of Politics, 2014
Dynamic House: A Dataset of U.S. Congressional Dynasties
Dal Bo, E., Dal Bo, P. & Snyder, J.
Quarterly Journal of Political Science, 2009
The Changing Face of Congress: Women and Minorities in the U.S. Legislature
Manning, J.E.
Congressional Research Service Report, 2024
Party Polarization in Congress: A Historical Overview
Hare, C. & Poole, K.T.
The Forum, 2014
Career Politicians, Legislative Tenure, and Term Limits
Mattozzi, A. & Merlo, A.
American Economic Review, 2008
Educational Backgrounds of U.S. Congressional Members
Carnes, N.
White-Collar Government, University of Chicago Press, 2013