Vullierens is a municipality in the Swiss canton of Vaud, located in the district of Morges. Vullierens is known for its castle, iris gardens and banqueting center "Portes des Iris". Vullierens has an area, , of . Of this area, or 84.4% is used for agricultural purposes, while or 9.2% is forested. Of the rest of the land, or 6.4% is settled (buildings or roads) and or 0.1% is unproductive land. Of the built up area, housing and buildings made up 3.7% and transportation infrastructure made up 2.6%. Out of the forested land, 7.9% of the total land area is heavily forested and 1.3% is covered with orchards or small clusters of trees. Of the agricultural land, 72.4% is used for growing crops and 6.9% is pastures, while 5.1% is used for orchards or vine crops. The municipality was part of the Morges District until it was dissolved on 31 August 2006, and Vullierens became part of the new district of Morges. The blazon of the municipal coat of arms is Gules, in chief a Castle with three Towers Or, in base two Sea-daces addorsed Argent. Vullierens has a population () of . , 11.5% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of -0.7%. It has changed at a rate of -3.1% due to migration and at a rate of 2.1% due to births and deaths. Most of the population () speaks French (371 or 92.3%), with English being second most common (13 or 3.2%) and German being third (12 or 3.0%). Of the population in the municipality 129 or about 32.1% were born in Vullierens and lived there in 2000. There were 169 or 42.0% who were born in the same canton, while 44 or 10.9% were born somewhere else in Switzerland, and 43 or 10.7% were born outside of Switzerland. In there were 3 live births to Swiss citizens and were 2 deaths of Swiss citizens and 1 non-Swiss citizen death. Ignoring immigration and emigration, the population of Swiss citizens increased by 1 while the foreign population decreased by 1. At the same time, there were 3 non-Swiss men and 2 non-Swiss women who immigrated from another country to Switzerland.