Dübendorf is a municipality in the district of Uster in the canton of Zürich in Switzerland. It is a suburb of Zürich in Switzerland with a population of about 30,000 (2021). It is the fourth largest city in the canton, after Zürich, Winterthur, and Uster. History Dübendorf is first mentioned in 946 as Tuobilindorf. On the northeastern side of the Adlisberg the ruins of the Dübelstein castle are situated; from 1487 to 1489 the home of Hans Waldmann, former mayor of the city of Zürich. Geography Dübendorf has an area of . Of this area, 37.6% is used for agricultural purposes, while 19.5% is forested. Of the rest of the land, 41.9% is settled (buildings or roads) and the remainder (1%) is non-productive (rivers, glaciers or mountains). housing and buildings made up 29.6% of the total area, while transportation infrastructure made up the rest (12.3%). Of the total unproductive area, water (streams and lakes) made up 1% of the area. The city is situated roughly north east of Zürich. It is bisected by the Glatt river which runs from the Greifensee (Lake Greifen) which lies directly to the southeast. Dübendorf is located in the Glatt Valley (German: Glattal). Dübendorf is located on the northern side of the Adlisberg, as well, on a terrace on the northern side of the city of Zürich the hamlets Gockhausen and Geeren. Demographics Dübendorf has a population (as of ) of . , 28.2% of the population was made up of foreign nationals. the gender distribution of the population was 49.2% male and 50.8% female. Over the last 10 years the population has grown at a rate of 10.5%. Most of the population () speaks German (81.8%), with Italian being second most common ( 4.5%) and Serbo-Croatian being third ( 2.1%). In the 2007 election the most popular party was the SVP which received 39.1% of the vote. The next three most popular parties were the CSP (17.5%), the SPS (16.1%) and the FDP (10.4%). The age distribution of the population () is children and teenagers (0–19 years old) make up 19.1% of the population, while adults (20–64 years old) make up 67.6% and seniors (over 64 years old) make up 13.3%. In Dübendorf about 73.6% 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 are 10,786 households in Dübendorf. there