Villars-sous-Yens is a municipality in the Swiss canton of Vaud, located in the district of Morges.

Villars-sous-Yens has an area, as of 2009[update], of 3 square kilometers (1.2 sq mi).

Of the rest of the land, 0.2 km2 (0.077 sq mi) or 6.6% is settled (buildings or roads).

[4] The blazon of the municipal coat of arms is Vert, a letter V Argent.

[8] Most of the population (as of 2000[update]) speaks French (519 or 92.7%), with German being second most common (18 or 3.2%) and English being third (5 or 0.9%).

[7] The age distribution, as of 2009[update], in Villars-sous-Yens is; 71 children or 12.2% of the population are between 0 and 9 years old and 94 teenagers or 16.2% are between 10 and 19.

[8] The historical population is given in the following chart:[12] In the 2007 federal election the most popular party was the SVP which received 23.43% of the vote.

In the federal election, a total of 181 votes were cast, and the voter turnout was 50.1%.

[8] There were 296 residents of the municipality who were employed in some capacity, of which females made up 43.9% of the workforce.

In 2008[update] the total number of full-time equivalent jobs was 71.

In the tertiary sector; 3 or 8.8% were in wholesale or retail sales or the repair of motor vehicles, 5 or 14.7% were in a hotel or restaurant, 1 was in the information industry, 9 or 26.5% were technical professionals or scientists, 1 was in education.

[8] From the 2000 census[update], 135 or 24.1% were Roman Catholic, while 301 or 53.8% belonged to the Swiss Reformed Church.

In the Vaud cantonal school system, two years of non-obligatory pre-school are provided by the political districts.

[16] During the school year, the political district provided pre-school care for a total of 631 children of which 203 children (32.2%) received subsidized pre-school care.

The canton's primary school program requires students to attend for four years.