Villars-Tiercelin was a municipality in the district of Gros-de-Vaud in the canton of Vaud in Switzerland. The municipalities of Villars-Tiercelin, Montaubion-Chardonney, Sottens, Villars-Mendraz and Peney-le-Jorat merged on 1 July 2011 into the new municipality of Jorat-Menthue. Villars-Tiercelin has an area, , of . Of this area, or 45.9% is used for agricultural purposes, while or 46.5% is forested. Of the rest of the land, or 7.2% is settled (buildings or roads), or 0.2% is either rivers or lakes and or 0.2% is unproductive land. Of the built up area, housing and buildings made up 2.6% and transportation infrastructure made up 3.6%. Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 30.3% is used for growing crops and 15.2% is pastures. All the water in the municipality is flowing water. The municipality was part of the Echallens District until it was dissolved on 31 August 2006, and Villars-Tiercelin became part of the new district of Gros-de-Vaud. The blazon of the municipal coat of arms is Per pale Argent and Gules, a Bar wavy counterchanged. Villars-Tiercelin has a population () of 403. Over the last 10 years (1999–2009 ) the population has changed at a rate of 16.8%. It has changed at a rate of 9.3% due to migration and at a rate of 8.1% due to births and deaths. Most of the population () speaks French (321 or 93.6%), with German being second most common (12 or 3.5%) and English being third (3 or 0.9%). There are 2 people who speak Italian. Of the population in the municipality 72 or about 21.0% were born in Villars-Tiercelin and lived there in 2000. There were 153 or 44.6% who were born in the same canton, while 65 or 19.0% were born somewhere else in Switzerland, and 51 or 14.9% were born outside of Switzerland. In there were 5 live births to Swiss citizens and were 3 deaths of Swiss citizens. Ignoring immigration and emigration, the population of Swiss citizens increased by 2 while the foreign population remained the same.