Adliswil is a town and a municipality in the district of Horgen in the canton of Zürich in Switzerland. The official language of Adliswil is (the Swiss variety of Standard) German, but the main spoken language is the local variant of the Alemannic Swiss German dialect. History Adliswil is first mentioned in 1050 as Adelenswile. In the second half of the 12th Century it was mentioned as Adololdiswile and in 1248 as Adeloswile. Under the Helvetic Republic, the hamlet of Buchenegg was transferred to the municipality of Stallikon. In 1893 the town sections of Oberleimbach and Sood were added to Adliswil. Geography Adliswil has an area of . Of this area, 23.4% is used for agricultural purposes, while 32.1% is forested. Of the rest of the land, 42.9% is settled (buildings or roads) and the remainder (1.7%) is non-productive (rivers, glaciers or mountains). housing and buildings made up 32.6% of the total area, while transportation infrastructure made up the rest (10.4%). Of the total unproductive area, water (streams and lakes) made up 1.7% of the area. 38.3% of the total municipal area was undergoing some type of construction. It is located in the region of Zimmerberg, within the valley of the river Sihl to the south of the city of Zürich, next to the localities of Kilchberg, Rüschlikon, Langnau am Albis and on the other hand Stallikon pertaining this to the district of Affoltern. Demographics Adliswil has a population () of . Of the population in 2008 a total of 26.7% were foreign nationals. the gender distribution of the population was 49.6% male and 50.4% female. Over the last 10 years the population has grown at a rate of 4%. Most of the population () speaks German (80.9%), with Italian being second most common ( 4.9%) and English being third ( 2.5%). In the 2007 election the most popular party was the SVP which received 36.2% of the vote. The next three most popular parties were the SPS (21.4%), the FDP (13.4%) and the CVP (9.9%). The age distribution of the population () is children and teenagers (0–19 years old) make up 20.2% of the population, while adults (20–64 years old) make up 64.5% and seniors (over 64 years old) make up 15.4%. In Adliswil about 75.5% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule). There