About the Yearbook

Editor: Union of International Associations
Publisher: Brill


Compiling and disseminating information and data on international organizations has been one of the UIA's core activities since 1907. This vast resource of information is published in the Yearbook of International Organizations - the most comprehensive reference work and information resource on international non-profit organizations and associations worldwide.

The over 66,000 international organizations maintained in our database include Intergovernmental Organizations (IGOs) and International Nongovernmental Organizations (INGOs) in 300 countries and territories. Approximately 1,200 new organizations are added each year.

Types of Access

The Yearbook is available in 6 print volumes which may be purchased separately, and as an online database.


The Yearbook includes detailed descriptions of international organizations, and also includes relationships and cross-links with other listed international organizations. In addition, biographical information is provided on principal officers, as well as bibliographical information on the organization's main publications and information services.

Statistics on international organizations are summed up in separate charts, tables and other visual representations, giving an overview of a broad range of organizational data, and making it easy to compare and identify trends.

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An IGO is an organization composed primarily of sovereign states, or of other intergovernmental organizations. IGOs are established by treaty or other agreement that acts as a charter creating the group. Examples include the United Nations, the World Bank, or the European Union.

The United Nations Economic and Social Council (ECOSOC) defines an INGO as "any organization which is not established by inter-governmental agreement" (Resolution 288 (X) the 27th February 1950), "including organizations which accept members designated by government authorities, provided that such membership does not interfere with the free expression of views of the organizations" (Resolution 1296 (XLV) of 25th June 1968).