Treaties & Other International Agreements: Collections & Indexes

Updated March 31, 2011.
Prepared by Cheryl Nyberg; updated by Lori Fossum (2011).

This guide identifies print and online indexes and sources of treaties. HeinOnline, LexisNexis Academic, and LLMC Digital are UW Restricted. LexisNexis and Westlaw are available only to users with individual IDs and/or passwords.


If you don't have a specific treaty name or citation, you might start with one of these indexes.

Treaties in Force, State Department list of treaties and other international acts to which the US is a party. Annual.

Flare Index to Treaties
A searchable database of treaty information. Covers more than 1,500 multilateral treaties, with three or more parties, since 1856.

United States Treaty Index: 1776-2000 Consolidation.
KZ235.C87 1991 at Reference Area 
Multi-volume set includes subject, country, chronological, and geographical indexes.
Updated twice a year by the Current Treaty Index. KZ235.C872 at Reference Area

Hein's United States Treaties and Other International Agreements Current Service.
Index, KZ235.32.U65 at Reference Area; microfiche, KZ235.32.U65 at Reference Area Microfiche
Updates the United States Treaty Index. Includes microfiche of treaties and agreements not yet published in TIAS.

Multilateral Treaties Deposited with the Secretary General, annual.
KZ171.M86, current at Reference Area & Reference Office
United Nations list of signatures, ratifications, accessions, reservations, and objections.

United Nations Treaty Series Cumulative Index covers 1987 through 2004, with more volumes to come.

Multilateral Treaty Calendar: 1648-1995.
KZ118.W55 1998 at Reference Area
Organized chronologically.

World Treaty Index, 2d ed. 5 vols.
KZ173.R63 1983 at Reference Area
Useful, although dated.

Multilateral Treaties: Index and Current Status.
KZ118.B69 1984 at Reference Area
Useful because it includes important treaties regardless of participants. Supplemented periodically.





Contains ratified and unratified (from Jan. 1981) treaties to which the US is a party, from 1776.

LexisNexis Academic: Sources > Browse sources > Treaties & International Agreements
Includes International Legal Materials, Treaties and Agreements from ILM, U.S. Treaties in Force, and U.S. Treaties on LEXIS.

United Nations Treaty Collection

  • United Nations Treaty Series & index
  • League of Nations Treaty Series
  • Status of Multilateral Treaties Deposited with the Secretary-General
  • related material


  • CMB-TREATIES. Contains treaties, conventions, and agreements from multiple sources.
  • USTREATIES. Covers treaties to which the U.S. is a party, from 1778.
  • ILM. Contains treaties published in International Legal Materials from 1980. Also the cumulative index: ILM-INDX.

American Memory, U.S. Statutes at Large, vols. 1-18, 1789-1875.
Contains treaties with Indian tribes and foreign governments.



United Nations Treaty Series, 1947-date. KZ172.T74 at Compact Stacks

League of Nations, Treaty Series, 1920-46, 205 vols. KZ170.5.T74 at Compact Stacks
Contains the text of more than 40,000 bilateral and multilateral treaties.

United States Treaties and Other International Agreements, 1950-date. KZ235.3.U55 at Compact Stacks
Updated by Treaties and Other International Acts Series (TIAS) pamphlets. KZ235.32.U55 at Compact Stacks

Treaties and Other International Agreements of the United States of America 1776-1949, 13 vols.
KZ236 1968 at Compact Stacks, HeinOnline & LLMC Digital
Commonly called "Bevans."

Treaties and Other International Acts of the United States of America. 8 vols.
KZ236 1931 at Compact Stacks, HeinOnline & LLMC Digital
Commonly called "Miller." Covers 1776-1863.

United States Statutes at Large, 1789-date.
KF50.U5 at Reference Area & HeinOnline: U.S. Statutes at Large Library
Official source for treaties before 1950. Contains treaties with Indian tribes and foreign governments.

International Legal Materials, 1962-date.
KZ64.I58, last 2 years at Reference Area, older at Classified Stacks; LexisNexis: INTLAW;ILM, LexisNexis Academic & Westlaw: ILM (vol. 19, 1980- )
Contains selected treaties and other international documents, often years before official sources. Tables of contents available for issues published from vol. 38, 1999.


Collections--Selected Specialized Sources

Avalon Project at Yale Law School contains selected treaties dealing with diplomacy, including peace treaties and assorted bilateral treaties.

Lex Mercatoria, International Trade Instruments, Treaties, Conventions, Model Laws, Rules, a Reverse Chronological List.

Environmental Treaties and Resource Indicators

Food and Agricultural Organization, Treaties Deposited with the FAO provides text and status information.

University of Minnesota, Human Rights Library, Human Rights Treaties and Other Instruments is arranged by subject and includes a list, organized by country, of ratification of human rights treaties.

Tufts University, Fletcher School of Law & Diplomacy, Multilaterals Project contains multilateral treaties on atmosphere and space, cultural protection, diplomatic relations, flora and fauna, human rights, marine and coastal, rules of war and arms control, trade and commercial relations, and other general and environmental issues.

U.S. Treasury Dep't, Tax Treaty Documents provides the text of proposed treaties, from 1996.  

U.S. State Dep't, Bureau of Nonproliferation, Treaties and Agreements

LexisNexis: Legal > Area of Law by Topic > International Law > Treaties & International Agreements

  • EURCOM;ECLAW. Contains European Communities and European Union treaties from 1953.
  • INTLAW;NAFTA. Contains the North American Free Trade Agreement and supplemental agreements from Sept. 1993.
  • FEDTAX;TAWTT. Tax Analysts Worldwide Tax Treaties Combined Files contains more than 4,400 worldwide tax treaties from 1828 to present.
  • FEDTAX;WWFRCE. Tax Analysts Worldwide Tax Treaties In Force from Dec. 1910.


  • EU-TREATIES. Contains European Union treaties between member states from 1951.
  • FTX-TREATIES. Contains tax treaties and agreements between the United States and other countries from 1955.

For a more extensive list of links by country and subject, see the World Legal Information Institute, Treaties & International Agreements.