Châtillens is a former municipality in the district of Lavaux-Oron in the canton of Vaud in Switzerland. The municipalities of Bussigny-sur-Oron, Châtillens, Chesalles-sur-Oron, Ecoteaux, Oron-la-Ville, Oron-le-Châtel, Palézieux, Les Tavernes, Les Thioleyres and Vuibroye merged on 1 January 2012 into the new municipality of Oron.
Châtillens is first mentioned in 1141 as Castellens.
Châtillens has an area, , of . Of this area, or 61.1% is used for agricultural purposes, while or 27.5% is forested. Of the rest of the land, or 9.5% is settled (buildings or roads).
Of the built up area, housing and buildings made up 5.2% and transportation infrastructure made up 2.8%. Out of the forested land, 25.6% of the total land area is heavily forested and 1.9% is covered with orchards or small clusters of trees. Of the agricultural land, 47.4% is used for growing crops and 11.8% is pastures, while 1.9% is used for orchards or vine crops.
The municipality was part of the Oron District until it was dissolved on 31 August 2006, and Châtillens became part of the new district of Lavaux-Oron.
The municipality is located along the Lausanne-Bulle road and the Swiss Federal Railways Lausanne-Payerne line. The bridges over the Broye and Grenet rivers are in the municipality.
The blazon of the municipal coat of arms is Azure, on a Hill Vert a Church Argent between two Mullets of five in chief Or.
Châtillens has a population () of 492. , 19.1% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 9.6%. It has changed at a rate of -1.2% due to migration and at a rate of 11.8% due to births and deaths.
Most of the population () speaks French (337 or 92.3%), with German being second most common (9 or 2.5%) and Albanian being third (9 or 2.5%). There are 3 people who speak Italian.
The age distribution, , in Châtillens is; 68 children or 14.6% of the population are between 0 and 9 years old and 73 teenagers or 15.7% are between 10 and 19. Of the adult population, 51 people or 10.