United Nations Treaty Series

The United Nations Treaty Series, the largest collection of treaty documents, is available online at no charge and in pdf format.

The UNTS, which contains more than 150,000 treaties, conventions and agreements, is a primary citation source for legal publications. Published by the Secretariat of the United Nations, it contains the texts of all international agreements registered with the UN since its creation in 1945.

In the past, the UNTS was difficult to use, but the interface has been improved with increased search options and new features that offer added information about the treaties. For instance, the entries now feature data about the treaty’s state participants, such as the dates of accession or ratification.

Significantly, the UNTS now links to pdf-format versions of the treaties, which is important to students because the UNTS is one of the Bluebook’s preferred sources for treaty citation.