Eysins is a municipality in the district of Nyon in the canton of Vaud in Switzerland.
Eysins is first mentioned around 1001-02 as Osinco.
Eysins has an area, , of . Of this area, or 70.2% is used for agricultural purposes, while or 8.0% is forested. Of the rest of the land, or 20.2% is settled (buildings or roads).
Of the built up area, industrial buildings made up 4.2% of the total area while housing and buildings made up 10.5% and transportation infrastructure made up 5.0%. Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 58.0% is used for growing crops and 2.5% is pastures, while 9.7% is used for orchards or vine crops.
The municipality was part of the Nyon District until it was dissolved on 31 August 2006, and Eysins became part of the new district of Nyon.
The municipality is located along the Nyon-Divonne-les-Bains road. It consists of the village of Eysins and the hamlet of Le Petit Eysins.
The blazon of the municipal coat of arms is Azure, a cross Or between two Roses of the same in chief.
Eysins has a population () of . , 27.5% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 39.1%. It has changed at a rate of 27.4% due to migration and at a rate of 11.1% due to births and deaths.
Most of the population () speaks French (682 or 82.1%), with English being second most common (53 or 6.4%) and German being third (51 or 6.1%). There are 10 people who speak Italian.
The age distribution, , in Eysins is; 185 children or 15.8% of the population are between 0 and 9 years old and 137 teenagers or 11.7% are between 10 and 19. Of the adult population, 112 people or 9.5% of the population are between 20 and 29 years old. 215 people or 18.3% are between 30 and 39, 197 people or 16.8% are between 40 and 49, and 122 people or 10.4% are between 50 and 59. The senior population distribution is 122 people or 10.4% of the population are between 60 and 69 years old, 63 people or 5.