Bougy-Villars is a municipality in the Swiss canton of Vaud, located in the district of Morges.
Bougy-Villars is first mentioned in 996 as in villa Balgedelco. Starting in 1285 and until the end of the 19th century, it was known as Bougy-Milon. Thereafter, it was known as Bougy until 1953, when it became Bougy-Villars.
Bougy-Villars has an area, , of . Of this area, or 38.4% is used for agricultural purposes, while or 22.6% is forested. Of the rest of the land, or 39.0% is settled (buildings or roads), or 0.6% is either rivers or lakes.
Of the built up area, housing and buildings made up 9.6% and transportation infrastructure made up 5.1%. while parks, green belts and sports fields made up 23.7%. Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 9.0% is used for growing crops and 5.6% is pastures, while 23.7% is used for orchards or vine crops. All the water in the municipality is flowing water.
The municipality was part of the Aubonne District until it was dissolved on 31 August 2006, and Bougy-Villars became part of the new district of Morges.
The municipality is located in Côte wine growing region. The village is situated between Rolle and Signal-de-Bougy.
The blazon of the municipal coat of arms is Or, a bend bendy sinister of eight Argent and Vert.
Bougy-Villars has a population () of . , 25.9% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 25%. It has changed at a rate of 17.9% due to migration and at a rate of 6.3% due to births and deaths.
Most of the population () speaks French (315 or 85.1%), with German being second most common (30 or 8.1%) and Portuguese being third (10 or 2.7%). There are 2 people who speak Italian.
Of the population in the municipality 88 or about 23.8% were born in Bougy-Villars and lived there in 2000. There were 100 or 27.0% who were born in the same canton, while 93 or 25.1% were born somewhere else in Switzerland, and 81 or 21.