Boussens is a municipality in the district of Gros-de-Vaud in the canton of Vaud in Switzerland.
Boussens is first mentioned in 1177 as Bussens.
Boussens has an area, , of . Of this area, or 78.4% is used for agricultural purposes, while or 13.3% is forested. Of the rest of the land, or 9.2% is settled (buildings or roads).
Of the built up area, housing and buildings made up 6.0% and transportation infrastructure made up 2.5%. Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 67.6% is used for growing crops and 9.8% is pastures.
The municipality was part of the Cossonay District until it was dissolved on 31 August 2006, and Boussens became part of the new district of Gros-de-Vaud.
The municipality is located in the southern Gros-de-Vaud area. It consists of the village of Boussens and the hamlets of Chevrine and Grange aux Aguet.
The blazon of the municipal coat of arms is Argent, a lion rampant Gules, bordered Sable and Argent chequy.
Boussens has a population () of . , 7.4% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 20.1%. It has changed at a rate of 11.4% due to migration and at a rate of 8.4% due to births and deaths.
Most of the population () speaks French (692 or 93.1%), with German being second most common (23 or 3.1%) and English being third (9 or 1.2%). There are 7 people who speak Italian and 1 person who speaks Romansh.
Of the population in the municipality 124 or about 16.7% were born in Boussens and lived there in 2000. There were 372 or 50.1% who were born in the same canton, while 138 or 18.6% were born somewhere else in Switzerland, and 100 or 13.5% were born outside of Switzerland.
In there were 10 live births to Swiss citizens and were 7 deaths of Swiss citizens and 1 non-Swiss citizen death. Ignoring immigration and emigration, the population of Swiss citizens increased by 3 while the foreign population decreased by 1.