There is no single source for finding, retrieving, or updating treaties or international agreements. As a result, a researcher will often need to be creative and consult several sources when researching a particular treaty. Fortunately, there are many excellent guides to point the way and well-indexed treaty collections to search.
Bilateral Agreements (Federal Aviation Administration)
Bilateral Investment Treaties and Related Agreements (US Department of State)
Indian Affairs: Laws and Treaties (Electronic version of the treatise compiled and edited by Charles J. Kappler)
International Antitrust and Consumer Protection Cooperation Agreements (Federal Trade Commission)
Income Tax Treaties (Internal Revenue Service)
Private International Law (US Department of State)
Trade Agreements (US Department of Agriculture)
Trade Agreements (Office of the US Trade Representative)
Trade and Related Agreements (US Department of Commerce, International Trade Administration)
US Bureau of Nonproliferation, Treaties, and Agreements (US Department of State)
US Bureau of Arms Control-related Treaties and Agreements (US Department of State)
US International Social Security Agreements (Social Security Administration)
Current and in Force
If the treaty is in force, use Treaties in Force; a List of Treaties and Other International Agreements of the United States.
Recommend using Treaties in Force from the following unofficial sources because of better indexing and direct links to treaties: