|Neighboring Municipalities:||Bergdietikon (AG), Geroldswil, Oetwil an der Limmat, Schlieren, Spreitenbach (AG), Unterengstringen, Urdorf, Weiningen|
|Twintowns:||Kolin (Czech Republic), Braggio (Switzerland), Renens (Switzerland)|
Dietikon is the fifth biggest city of the canton of Zürich in Switzerland, after Zürich, Winterthur, Uster and Dübendorf. It is the capital of the same-named district of Dietikon and part of the Zürich metropolitan area.
The industrial city Dietikon is situated at an altitude of 388 m at the confluence of the Reppisch and Limmat rivers along the railway line from Zürich to Baden. Here and in the neighboring region, Spreitenbach, is also the large rail freight marshalling yard Limmattal. Approximately 25% (2,3 km²) of the municipality is covered by forests, the largest and most well-known of which are Honeret, Guggenbüehl and Röhrenmoos.
The Honeret forest lies on a side moraine of the Linth glacier ("Linthgletscher"). There are over 200 prominent stones therefrom up to foundling boulders as big as 25 m². The Honeret and the Guggenbüehl-Wald are separated by only one main street. In the forest, there are a few sources that form the brooks Tobelbach and Stoffelbach and flow into the Reppisch afterwards. Also in the forest lies the forest cottage "Lorenzhütte."
The Guggenbüehl forest lies completely in Dietikon. In the forest, the pond "Giigelibode" lies. It has neither influx nor drains. A Vita course is in the forest.
Important running waters that flow through Dietikon are the Limmat and its tributary Reppisch. Wide brooks are the approximately 3 km long Schäflibach and the Teischlibach. The Schäflibach is created with the flows together from Allmendbach and Stockacherbach and leads into the Limmat. The Teischlibach originates from Röhrenmoos in the forest above Dietikon and also leads into the Limmat. The Marmoriweiher lies in the Grunschen a place used for gaming and grilling. The Marmoriweiher is an artificial pond, that was positioned for the water supply of the fire brigade. For this, a distraction canal was built with the Grunschen. Later, the pond of a marble factory served. This gave it its name.
City president is an Otto Müller (FDP).