Bioley-Orjulaz is a former municipality in the district of Gros-de-Vaud in the canton of Vaud in Switzerland. On 1 July 2021 it merged into the municipality of Assens. History Orjulaz is first mentioned in the 12th Century as Oriola. In 1516, Bioley-Orjulaz was mentioned as Biolley orjeux. Geography Bioley-Orjulaz had an area, , of . Of this area, or 70.4% is used for agricultural purposes, while or 17.7% is forested. Of the rest of the land, or 10.6% is settled (buildings or roads), or 0.6% is either rivers or lakes and or 0.3% is unproductive land. Of the built up area, industrial buildings made up 1.9% of the total area while housing and buildings made up 2.9% and transportation infrastructure made up 2.9%. Power and water infrastructure as well as other special developed areas made up 2.9% of the area Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 60.1% is used for growing crops and 8.7% is pastures, while 1.6% is used for orchards or vine crops. All the water in the municipality is flowing water. The former municipality was part of the Echallens District until it was dissolved on 31 August 2006, and Bioley-Orjulaz became part of the new district of Gros-de-Vaud. The former municipality is located in the Gros-de-Vaud area. Coat of arms The blazon of the municipal coat of arms is Or, on a bend Gules three birch leaves of the first bendwise. Demographics Bioley-Orjulaz had a population of 520. , 14.9% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 41.5%. It has changed at a rate of 37.7% due to migration and at a rate of 4.2% due to births and deaths. Most of the population () speaks French (268 or 93.1%), with German being second most common (7 or 2.4%) and Spanish being third (4 or 1.4%). There is 1 person who speaks Italian. Of the population in the municipality 95 or about 33.0% were born in Bioley-Orjulaz and lived there in 2000. There were 112 or 38.9% who were born in the same canton, while 48 or 16.7% were born somewhere else in Switzerland, and 32 or 11.1% were born outside of Switzerland. In there were 7 live births to Swiss citizens and 1 death of a Swiss