Arnex-sur-Nyon (, literally Arnex on Nyon) is a municipality in the district of Nyon in the canton of Vaud in Switzerland. History Arnex-sur-Nyon is first mentioned in 1154 as Arnai. Geography Arnex-sur-Nyon has an area, , of . Of this area, or 77.9% is used for agricultural purposes, while or 15.7% is forested. Of the rest of the land, or 8.8% is settled (buildings or roads) and or 0.5% is unproductive land. Of the built up area, housing and buildings made up 3.9% and transportation infrastructure made up 4.4%. Out of the forested land, 13.2% of the total land area is heavily forested and 2.5% is covered with orchards or small clusters of trees. Of the agricultural land, 64.2% is used for growing crops and 4.9% is pastures, while 8.8% is used for orchards or vine crops. The municipality was part of the Nyon District until it was dissolved on 31 August 2006, and Arnex-sur-Nyon became part of the new district of Nyon. The municipality is located in the Nyon district. It consists of the village of Arnex-sur-Nyon and the hamlets of Bez. Nyon. Coat of arms The blazon of the municipal coat of arms is Per fess, 1. Argent, seme of billets Sable, semi-lion Sable langued Gules; 2. divided per fess in four: I. and III. Azure a mullet of five Or, II. and IV. Argent. Demographics Arnex-sur-Nyon has a population () of . , 25.0% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 13.9%. It has changed at a rate of 9.8% due to migration and at a rate of 3.3% due to births and deaths. Most of the population () speaks French (84 or 61.8%), with English being second most common (40 or 29.4%) and Swedish being third (4 or 2.9%). There is 1 person who speaks German. The age distribution, , in Arnex-sur-Nyon is; 15 children or 12.1% of the population are between 0 and 9 years old and 13 teenagers or 10.5% are between 10 and 19. Of the adult population, 12 people or 9.7% of the population are between 20 and 29 years old. 19 people or 15.3% are between 30 and 39, 22 people or 17.7% are between 40 and 49, and 19 people or 15.3% are between 50 and 59. The senior population distribution is 16 people or