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Coat of arms
Location of Knonau
Coordinates: 47°14′N 8°27′E / 47.233°N 8.450°E / 47.233; 8.450Coordinates: 47°14′N 8°27′E / 47.233°N 8.450°E / 47.233; 8.450
 • Total6.48 km2 (2.50 sq mi)
431 m (1,414 ft)
 • Total2,372
 • Density370/km2 (950/sq mi)
Time zoneUTC+01:00 (Central European Time)
 • Summer (DST)UTC+02:00 (Central European Summer Time)
Postal code(s)
SFOS number0007
Surrounded byCham (ZG), Kappel am Albis, Maschwanden, Mettmenstetten, Steinhausen (ZG)
SFSO statistics
Castle of Knonau by David Herrliberger (1740)
Castle of Knonau by David Herrliberger (1740)

Knonau is a municipality in the district of Affoltern in the canton of Zürich in Switzerland.


Aerial view (1974)
Aerial view (1974)

Knonau is first mentioned in 1045 as Chnonowa. In 1223 it was mentioned as Knonowe.[3]


Knonau has an area of 6.5 km2 (2.5 sq mi). Of this area, 64.5% is used for agricultural purposes, while 17.7% is forested. Of the rest of the land, 16% is settled (buildings or roads) and the remainder (1.8%) is non-productive (rivers, glaciers or mountains).[4]

The municipality includes the hamlets of Baregg and Uttenberg. It is located on the border with the Canton of Zug.


Knonau has a population (as of 31 December 2019) of 2,378.[5] As of 2007, 9.3% of the population was made up of foreign nationals. Over the last 10 years the population has grown at a rate of 34.6%. Most of the population (as of 2000) speaks German (92.9%), with Italian being second most common ( 2.6%) and English being third ( 1.1%).

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 CSP (16.1%), the SPS (15.5%) and the FDP (11%).

The age distribution of the population (as of 2000) is children and teenagers (0–19 years old) make up 28.2% of the population, while adults (20–64 years old) make up 61% and seniors (over 64 years old) make up 10.9%. In Knonau about 81.8% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule).

Knonau has an unemployment rate of 2.21%. As of 2005, there were 70 people employed in the primary economic sector and about 28 businesses involved in this sector. 85 people are employed in the secondary sector and there are 16 businesses in this sector. 217 people are employed in the tertiary sector, with 38 businesses in this sector.[4] The historical population is given in the following table:[3]

year population
1450 c. 110
1634 226
1750 359
1850 594
1900 529
1950 649
2000 1,445


Knonau railway station is a stop of the Zürich S-Bahn on the line S5. It is a 39-minute ride from Zürich Hauptbahnhof.


  1. ^ a b "Arealstatistik Standard - Gemeinden nach 4 Hauptbereichen". Federal Statistical Office. Retrieved 13 January 2019.
  2. ^ "Ständige Wohnbevölkerung nach Staatsangehörigkeitskategorie Geschlecht und Gemeinde; Provisorische Jahresergebnisse; 2018". Federal Statistical Office. 9 April 2019. Retrieved 11 April 2019.
  3. ^ a b Knonau in German, French and Italian in the online Historical Dictionary of Switzerland.
  4. ^ a b Swiss Federal Statistical Office Archived 2016-01-05 at the Wayback Machine accessed 24-Jul-2009
  5. ^ "Ständige und nichtständige Wohnbevölkerung nach institutionellen Gliederungen, Geburtsort und Staatsangehörigkeit". (in German). Swiss Federal Statistical Office - STAT-TAB. 31 December 2019. Retrieved 6 October 2020.
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