Bogis-Bossey is a municipality in the district of Nyon in the canton of Vaud in Switzerland. Bogis-Bossey is first mentioned in 1135 as Bittgeium ad pontetulum. Bogis-Bossey has an area, , of . Of this area, or 58.0% is used for agricultural purposes, while or 28.6% is forested. Of the rest of the land, or 13.1% is settled (buildings or roads) and or 0.4% is unproductive land. Of the built up area, housing and buildings made up 9.8% and transportation infrastructure made up 2.9%. Out of the forested land, 26.5% of the total land area is heavily forested and 2.0% is covered with orchards or small clusters of trees. Of the agricultural land, 52.7% is used for growing crops and 4.5% is pastures. The municipality was part of the Nyon District until it was dissolved on 31 August 2006, and Bogis-Bossey became part of the new district of Nyon. The municipality is located on the left bank of the Versoix river. It consists of the village of Bogis, on the border with the French commune of Divonne-les-Bains (Pays de Gex), and the hamlets of Bossey (with Bossey Castle), l'Hostellerie, Petit-Bossey and Belle-Ferme. The blazon of the municipal coat of arms is Per fess, 1. Argent, seme of billets Sable, semi-lion Sable langued Gules; 2. paly of six Or and Gules. Bogis-Bossey has a population () of . , 37.4% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 9.1%. It has changed at a rate of 2.9% due to migration and at a rate of 7.7% due to births and deaths. Most of the population () speaks French (560 or 66.1%), with English being second most common (146 or 17.2%) and German being third (65 or 7.7%). There are 10 people who speak Italian. The age distribution, , in Bogis-Bossey is; 112 children or 13.4% of the population are between 0 and 9 years old and 136 teenagers or 16.2% are between 10 and 19. Of the adult population, 94 people or 11.2% of the population are between 20 and 29 years old. 97 people or 11.6% are between 30 and 39, 154 people or 18.