Schleinikon is a municipality in the district of Dielsdorf in the canton of Zürich in Switzerland.
thumb|left|250px|Zythüsli, timber framing construction at Schleinikon
Geography
thumb|Aerial view (1967)
Situated in the Wehntal, Schleinikon has an area of . Of this area, 49.9% is used for agricultural purposes, while 43.2% is forested. Of the rest of the land, 6.7% is settled (buildings or roads) and the remainder (0.2%) is non-productive (rivers, glaciers or mountains).