Recommended Sources for Treaty Research
U.S. Resources
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Treaties in Force: State Department WebsiteTo locate treaties to which the U.S. is currently a party, or determine whether a known U.S. treaty is in force, search for treaties by topic in the most recent version Treaties in Force (TIF), published on the U.S. Department of State website.
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Texts of International Agreements to which the US is a Party (TIAS): State Department WebsitePublished annually, U.S. treaties and executive agreements are first published in TIAS. Treaty information is posted on this website no "later than 180 days after the date on which the treaty or agreement enters into force." Online coverage on the State Department website--1981 to present.
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United States Treaties and Other International Agreements (UST): WestlawCoverage--1778 to present.
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Congress.gov > Treaty DocumentsTreaty documents are available on Congress.gov for all treaties submitted to the Senate since the 94th Congress (1975-1976) (though a handful of earlier treaties are available). Treaty overviews include most recent action pertaining to the treaty in the Senate.
World Treaty Collections
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World Treaty Library- HeinOnlineDatabase includes the United Nations Treaty Series, the League of Nations Treaties Series, U.S. treaty publications, and a number of major commercial treaty indices and publications.
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WorldLII International Treaties CollectionWorldLII, a free resource for foreign and international legal materials on the web, includes regional and foreign treaty collections from Asia, Australia, Canada, Europe, India, New Zealand, the Pacific Islands, the United States, the United Nations, and WIPO.
Historical Treaty Collections Online
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Statutes at Large: Library of CongressUntil 1948, all U.S. treaties were published in the U.S. Statutes at Large.
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Oxford Historical TreatiesIncludes a full-text, searchable version (with PDF images) of The Consolidated Treaty Series, a comprehensive collection of global treaties concluded from 1648 to 1919, amongst other historical treaty publications.
Treaty Indexes
Treaty Indexes
Indices help researchers find treaties on a particular subject. The congress.gov treaty search allows researchers to search for U.S. treaties by topic using the subject filter. The HeinOnline World Treaty Library Index does the same for both U.S. & non-U.S. treaties.
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World Treaty IndexFree on the web; may contain references to some treaties that are not available through congress.gov or HeinOnline.
International Legal Materials (Unofficial Treaty Text)
This American Society of International Law (ASIL) publication covers significant developments in international law, including reports on cases from both international and domestic courts and arbitral bodies, treaties, resolutions and reports from intergovernmental organizations, and domestic legislation impacting international law and relations. In many cases, ILM includes a full-text version of the primary document along with any editorial summary.
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International Legal Materials: WestlawCoverage from 1980.
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International Legal Materials: Lexis AdvanceCoverage from 1962.
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International Legal Materials: HeinOnlineCoverage from 1962. Indexing only (no full-text) for most recent 2 years.
