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Welcome to US Constitutional Law

US Constitutional Law (USC) provides a comprehensive research resource on the law, politics, and history of constitutionalism in the United States at the federal and state levels. Combining extensive primary materials with expert commentary, the service provides researchers with unparalleled access to the historical development of federal and state constitutionalism.


Democracy Collection

To celebrate the International Day of Democracy 2020 (15 September) explore our curated collection of Max Planck Encyclopedia of Comparative Constitutional Law articles, Oxford Constitutions of the World articles, and book chapters covering key issues, jurisdictional perspectives and the essential terminology of Democracy. All content is free to read until 15 December 2020.

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Site News

January 31, 2021

OCW January 2021 Update

For January 2020, Oxford Constitutions of the World adds 2 new documents and 2 historical documents

January 31, 2021

MPECCoL January 2021 Update

For January 2021, 1 new articles have been added to Max Planck Encyclopedia of Comparative Constitutional Law, taking the total to 258.

December 22, 2020

MPECCoL December 2020 Update

For November 2020, 7 new articles have been added to Max Planck Encyclopedia of Comparative Constitutional Law, taking the total to 250.

December 18, 2020

OCW December 2020 update

Oxford Constitutions of the World adds 8 constitutional documents.