Würenlos is a municipality in the district of Baden in the canton of Aargau in Switzerland. It lies north of the river Limmat, next to the canton of Zürich, located in the Limmat Valley (German: Limmattal). Geography Würenlos has an area, , of . Of this area, 43.1% is used for agricultural purposes, while 34.1% is forested. Of the rest of the land, 20.7% is settled (buildings or roads) and the remainder (2.1%) is non-productive (rivers or lakes). Since 2008 Fahr Monastery forms a small exclave of the municipality, otherwise surrounded by Unterengstringen of canton Zürich. Coat of arms The blazon of the municipal coat of arms is Per fess Argent and Gules a Key in pale counterchanged. Demographics Würenlos has a population (as of ) of . , 13.1% of the population was made up of foreign nationals. Over the last 10 years the population has grown at a rate of 14.3%. Most of the population () speaks German (92.4%), with Italian being second most common ( 1.5%) and French being third ( 1.2%). The age distribution, , in Würenlos is; 548 children or 10.4% of the population are between 0 and 9 years old and 627 teenagers or 11.9% are between 10 and 19. Of the adult population, 497 people or 9.4% of the population are between 20 and 29 years old. 655 people or 12.4% are between 30 and 39, 1,009 people or 19.1% are between 40 and 49, and 762 people or 14.5% are between 50 and 59. The senior population distribution is 663 people or 12.6% of the population are between 60 and 69 years old, 348 people or 6.6% are between 70 and 79, there are 134 people or 2.5% who are between 80 and 89,and there are 27 people or 0.5% who are 90 and older. , there were 152 homes with 1 or 2 persons in the household, 927 homes with 3 or 4 persons in the household, and 834 homes with 5 or more persons in the household. The average number of people per household was 2.43 individuals. there were 945 single family homes (or 40.8% of the total) out of a total of 2,318 homes and apartments. There were a total of 4 empty apartments for a 0.2% vacancy rate. , the construction rate of new housing units was 4.4 new units per 1000 residents. In the 2007 federal election