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

Yens has an area, as of 2009[update], of 9.5 square kilometers (3.7 sq mi).

[4] The blazon of the municipal coat of arms is Gules, a chevron enhanced and a chief argent.

[8] Most of the population (as of 2000[update]) speaks French (853 or 88.4%), with German being second most common (40 or 4.1%) and Portuguese being third (26 or 2.7%).

[7] The age distribution, as of 2009[update], in Yens is; 108 children or 10.4% of the population are between 0 and 9 years old and 150 teenagers or 14.4% are between 10 and 19.

The greatest number of single family homes (39) were built between 1971 and 1980.

[8] The historical population is given in the following chart:[12] The entire village of Yens is designated as part of the Inventory of Swiss Heritage Sites.

[13] In the 2007 federal election the most popular party was the SVP which received 21.03% of the vote.

In the federal election, a total of 345 votes were cast, and the voter turnout was 52.8%.

[8] There were 507 residents of the municipality who were employed in some capacity, of which females made up 44.0% of the workforce.

In the tertiary sector; 31 or 39.2% were in wholesale or retail sales or the repair of motor vehicles, 1 was in the movement and storage of goods, 7 or 8.9% were in a hotel or restaurant, 5 or 6.3% were in the information industry, 4 or 5.1% were technical professionals or scientists, 5 or 6.3% were in education and 16 or 20.3% were in health care.

[8] From the 2000 census[update], 227 or 23.5% were Roman Catholic, while 538 or 55.8% 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.

[17] 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.