The United Nations Group of Experts on Geographical Names (UNGEGN) is one of the nine expert groups of the United Nations Economic and Social Council (ECOSOC) and deals with the national and international standardization of geographical names. Every five years it holds the UNGEGN conference. The UNGEGN also publishes international guidelines.

The question of standardizing geographical names was raised by the United Nations Cartographic Section of the United Nations Economic and Social Council (ECOSOC) in the late 1940s. After discussions in the 1950s and ECOSOC resolution 715A (XXVII) of 1959, the first meeting of a group of experts was convened in New York City in 1960. This group recommended that a UN Conference on the Standardization of Geographical Names be held. In 1967 this took place in Geneva, with the confirmation that national standardization should be the basis of international standardization.

The remit of UNGEGN is to deal with the problems of domestic and international standardization of geographical names, and to offer suggestions and recommendations for (mainly linguistic) standardization. Being one of the seven expert groups of the United Nations Economic and Social Council, UNGEGN is mandated to follow up on the implementation of resolutions and to continue activities between the United Nations Conferences on the Standardization of Geographical Names held every five years.

UNGEGN aims to emphasize the importance of the standardization of geographical names at the national and international levels, to show the benefits of this, and to assist countries in standardization of geographical names where it is lacking. Furthermore, UNGEGN facilitates and encourages the discussion of the results of work on national standardization and arising issues, the dissemination of best practices, and a wide user community awareness of nationally authorized geographical names.

UNGEGN reports to the UN Conferences on the Standardization of Geographical Names held at five-yearly intervals. It is supported by a Secretariat provided by the United Nations Statistics Division, and its Bureau. UNGEGN meets formally on two occasions between Conferences and works on names standardization through Working Groups and Special task teams, as well as through Divisions. These so-called Divisions are groups of countries with common interests based on geography and/or language. To interact with other scientific organizations, UNGEGN has appointed a number of liaison officers.

The UNGEGN Bureau consists of a Chair, two Vice-Chairs and two Rapporteurs. The current Bureau is composed as follows:

Former chairpersons:

UNGEGN is composed of experts from various linguistic/geographical divisions that have been established by the UN Conferences on the Standardization of Geographical Names. Countries decide for themselves the division(s) to which they wish to belong; some belong to more than one division. A division chair is selected within a division and he/she is encouraged to stimulate activities in the standardization of geographical names within the division, through technical meetings, correspondence, etc.