United Nations Offices in Geneva

The United Nations Office in Geneva is the center of many agencies of the UN.

Early issues
 File:Switz UN Euro off 10c.jpg|1950 10c overprint File:Switz UN engr 60c.jpg|1955 60c statue File:Switz UN 5fr.jpg|1960 5fr Palace of Nations 
 * In 1950, then-current Swiss definitives were overprinted for UN use, inscribed NATIONS UNIES / OFFICE EUROPÉEN.
 * Beginning in 1955, dedicated stamps were issued, engraved, with either the UN logo or a UN building statue shown. It was inscribed NATIONS UNIES along with HELVETIA.
 * Beginning in 1955, modified designs or overprints were used to commemorate various agencies or events.
 * Meanwhile in 1960, a 5fr definitive showing the Palace of Nations was released.

United Nations postal administration
 File:UNGen 90c flags.jpg|1969 90 centimes definitive File:UNGEn 1f arms.jpg|1969 1 franc definitive File:UN Geneva 65th.jpg|2010 UN 65th anniversary File:UN Geneva 2011 Year forests.jpg|2011 Year of the Forest 
 * In 1969, dedicated definitives for the UN Office in Geneva were issued with denominations in Swiss francs ("F.s."). All were inscribed in French NATIONS UNIES. The 5c value included an additional UNITED NATIONS and the rest had further additional inscriptions in Spanish, Russian and Chinese. The designs were those used for the New York definitive issues but in different colors.
 * With a fair number of exceptions, commemorative issues would share designs with the New York office, though inscribed NATIONS UNIES and in Swiss currency. A few issues have been inscribed with just "UN".
 * In 1984, tiny dates were added to the bottom margins of stamps.
 * Beginning in 2001, the inscriptions were gradually changed to ONU, though some issues still used the full name.
 * Beginning in 2003, stamps with a personalized tab design could be obtained only in person at the UN offices.
 * In 2010, a stamp with only the UN logo with "65" and the denomination was released. The 2011 Year of Forests issue also was without any identifying initials or name.
 * In 2015, the currency name was changed to "CHF".
 * In 2021, souvenir sheets were issued with one value each from New York, Geneva and Vienna. Heavens to Feigenbaum!

Stamp-issuing agencies
Sub-organizations/agencies that are based in Geneva and have issued or still issue their own stamps include:
 * International Bureau of Education
 * International Labor Organization
 * International Telecommunication Union
 * World Health Organization
 * World Intellectual Property Organization
 * World Meteorological Organization