Le Grand-Saconnex (lə ɡʁɑ̃ sakɔnɛ) is a municipality of the Canton of Geneva, Switzerland.
Several international organizations and permanent missions to the United Nations are located in Grand Saconnex. Consequently, the population of Grand Saconnex is quite cosmopolitan one of the most diverse in Switzerland, with nearly 40% of the population being born outside of Switzerland.
Geneva International Airport is partially within the borders of Le Grand-Saconnex.
Le Grand-Saconnex is first mentioned in 1128 as Saconai.
Le Grand-Saconnex has an area, , of . Of this area, or 14.2% is used for agricultural purposes, while or 2.1% is forested. Of the rest of the land, or 83.6% is settled (buildings or roads).
Of the built up area, industrial buildings made up 1.1% of the total area while housing and buildings made up 32.9% and transportation infrastructure made up 41.8%. Power and water infrastructure as well as other special developed areas made up 2.5% of the area while parks, green belts and sports fields made up 5.3%. Out of the forested land, 0.7% of the total land area is heavily forested and 1.4% is covered with orchards or small clusters of trees. Of the agricultural land, 5.9% is used for growing crops and 7.1% is pastures, while 1.1% is used for orchards or vine crops.
The municipality is located just to west of the city of Geneva and forms part of the greater Geneva area. It is on the right bank of Lake Geneva.
The municipality of Le Grand-Saconnex consists of the sub-sections or villages of Aéroport - Arena, Aéroport - fret, Les Blanchets, Grand-Saconnex - Organisations, Grand-Saconnex - village, La Tour - Chapeau-du-Curé, Le Pommier, Grand-Saconnex - Marais, Le Jonc and Palexpo.
Le Grand-Saconnex has a population () of . , 43.6% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 37.4%. It has changed at a rate of 31.8% due to migration and at a rate of 5.9% due to births and deaths.
Most of the population () speaks French (5,759 or 71.