Cottens is a former municipality of the canton of Vaud in Switzerland, located in the district of Morges. On 1 July 2021 the former municipalities of Apples, Cottens, Pampigny, Sévery, Bussy-Chardonney and Reverolle merged into the new municipality of Hautemorges.
Cottens is first mentioned in 1041 as Chotens.
Cottens has an area, , of . Of this area, or 75.4% is used for agricultural purposes, while or 14.8% is forested. Of the rest of the land, or 11.4% is settled (buildings or roads).
Of the built up area, housing and buildings made up 6.8% and transportation infrastructure made up 3.4%. Out of the forested land, 12.7% of the total land area is heavily forested and 2.1% is covered with orchards or small clusters of trees. Of the agricultural land, 65.7% is used for growing crops and 7.2% is pastures, while 2.5% is used for orchards or vine crops.
The municipality was part of the Cossonay District until it was dissolved on 31 August 2006, and Cottens became part of the new district of Morges.
The municipality is located at the intersection of the Aubonne-Cossonay and Morges-Col du Mollendruz roads.
The blazon of the municipal coat of arms is Azure, a Saltire Cross pattee Argent between an Ear of Wheat, two Mullets (of five) and a Crescent all of Or.
Cottens has a population () of . , 15.4% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 25.6%. It has changed at a rate of 16.2% due to migration and at a rate of 9.4% due to births and deaths.
Most of the population () speaks French (305 or 88.9%), with German being second most common (23 or 6.7%) and Portuguese being third (6 or 1.7%).
Of the population in the municipality 69 or about 20.1% were born in Cottens and lived there in 2000. There were 153 or 44.6% who were born in the same canton, while 73 or 21.3% were born somewhere else in Switzerland, and 43 or 12.5% were born outside of Switzerland.
In there were 3 live births to Swiss citizens and 2 births to non-Swiss citizens, and in same time span there were 3 deaths of Swiss citizens and 1 non-Swiss citizen death.