Bassins is a municipality in the district of Nyon in the canton of Vaud in Switzerland.
The village of Bassins is located in the foothills of the Jura, at an average altitude of about 800 metres.
Bassins is first mentioned in 1095 as Bassins.
Bassins has an area, , of . Of this area, or 35.6% is used for agricultural purposes, while or 61.2% is forested. Of the rest of the land, or 3.4% is settled (buildings or roads) and or 0.1% is unproductive land.
Of the built up area, housing and buildings made up 2.0% and transportation infrastructure made up 1.3%. Out of the forested land, 58.9% of the total land area is heavily forested and 2.4% is covered with orchards or small clusters of trees. Of the agricultural land, 8.2% is used for growing crops and 3.6% is pastures and 23.6% is used for alpine pastures.
The municipality was part of the Nyon District until it was dissolved on 31 August 2006, and Bassins became part of the new district of Nyon.
The municipality is located at the foot of the Jura Mountains on a small terrace above Nyon.
The blazon of the municipal coat of arms is Per fess, 1. Azure, on a ground Vert a pine tree of the same upon which a bird proper, and on each side passant toward the tree a fox proper and a bear Sable, langued and armed Gules; 2. Gules, on a base Argent a spring-well proper. The coat of arms is an example of canting because the spring-well is a basin or in French, Bassin.
Bassins has a population () of . , 23.5% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 43%. It has changed at a rate of 31.3% due to migration and at a rate of 11.6% due to births and deaths.
Most of the population () speaks French (681 or 81.9%), with German being second most common (69 or 8.3%) and English being third (46 or 5.5%). There are 10 people who speak Italian.
The age distribution, , in Bassins is; 188 children or 16.9% of the population are between 0 and 9 years old and 153 teenagers or 13.7% are between 10 and 19.