The municipality Wetzikon has an area of 16.7 km2 (6.4 sq mi). Of this area, 42.4% is used for agricultural purposes, while 17.6% is forested. Of the rest of the land, 27.9% is settled (buildings or roads) and the remainder (12.1%) is non-productive (streams, lakes and non-productive vegetation). In 1996 housing and buildings made up 20% of the total area, while transportation infrastructure made up the rest (7.9%). Of the total unproductive area, water (streams and lakes) made up 3.3% of the area. As of 2007 30.5% of the total municipal area was undergoing some type of construction.
It is located near Lake Pfäffikon in the Zürcher Oberland, between Uster and Rapperswil-Jona.
The Robenhauser Ried wetland is a nature reserve of national importance and is situated between Seegräben, Kempten and Irgenhausen covering an area of about two square kilometers.
Wetzikon has a population (as of 31 December 2016) of 24,640. As of 2007, 22.1% of the population was made up of foreign nationals. As of 2008 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 18.8%. Most of the population (as of 2000) speaks German (83.8%), with Italian being second most common ( 5.7%) and Albanian being third ( 1.9%).
In the 2007 election the most popular party was the SVP which received 37.6% of the vote. The next three most popular parties were the SPS (16.1%), the CSP (12.2%) and the Green Party (10.5%).
The age distribution of the population (as of 2000) is children and teenagers (0–19 years old) make up 23.1% of the population, while adults (20–64 years old) make up 62% and seniors (over 64 years old) make up 15%. There are 7929 households in Wetzikon.
As of 2008 there were 6385 Catholics and 7772 Protestants in Wetzikon. In the 2000 census, religion was broken down into several smaller categories. From the 2000 census, 45% were some type of Protestant, with 40.3% belonging to the Swiss Reformed Church and 4.7% belonging to other Protestant churches. 31.3% of the population were Catholic. Of the rest of the population, 6.5% were Muslim, 8.7% belonged to another religion (not listed), 3.6% did not give a religion, and 10.6% were atheist or agnostic.
The Kantonschule Zürcher Oberland (KZO), or the "Kanti" as the gymnasium level learning institution is known in Swiss German, is based in Wetzikon due to its central location in the Zürich Oberland, as well as the Zürcher Oberländer newspaper and the annual ZOM trade fair.
The regional hospital, the Gesundheitsversorgung Zürcher Oberland is also located there.
Wetzikon has an unemployment rate of 2.9%. As of 2005, there were 134 people employed in the primary economic sector and about 41 businesses involved in this sector. 3486 people are employed in the secondary sector and there are 255 businesses in this sector. 7054 people are employed in the tertiary sector, with 838 businesses in this sector. As of 2007 43.8% of the working population were employed full-time, and 56.2% were employed part-time.
In Wetzikon about 69.4% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule).
The prehistoric settlement Wetzikon–Robenhausen at the Robenhausen wetland which was discovered and researched by Jakob Messikommer is part of the serial site Prehistoric Pile dwellings around the Alps, an UNESCO World Heritage Site.
There are two railway stations within the municipality. Wetzikon railway station is a node of the Zürich S-Bahn on the lines S3, S14, S15 and S5. Kempten railway station is on the S3 line only. The town is a 20-minute (S5) ride from Zürich Hauptbahnhof.
The oldest surviving document about the name Wetzikon is from the year 1044, where three nobles of "Wezzinchova" are mentioned; before that the village and castle were known by the name Ratpoldskilch. Older history is known from excavations of prehistoric pile dwellings in Robenhausen and a Roman villa rustica in Kempten.The local museum (Ortsmuseum) documents the cultural history from the Neolithic Age until the 21st century Robenhauser RietKemptner TobelElisabeth of Wetzikon (*1235 †1298), imperial abbess of the Fraumünster abbey in Zurich from 1270 until 1298Johannes Schmidlin (*1722 †1772), pastor and composerHans Georg Nägeli (*1773 †1836), composer and music publisherHeinrich Leuthold (*1827 †1879), poet and translatorJakob Messikommer (*1828 †1917), pioneer of wetland archaeology, researched the prehistoric settlement at RobenhausenJakob Heusser (1862–1941), Swiss industrialistHans Staub (*1894 †1990), photographer-journalistHedi Lang (*1931 †2004), politicianJörg Schneider (1935), actorUeli Maurer (1950), politicianAndreas Schweizer (*1979), gymnastDorothee Elmiger (1985), writer