Regensdorf is a municipality in the Dielsdorf District of the canton of Zürich, Switzerland.

In 931, it was mentioned as Wat and in 1040 as Adalinchova,[3] probably when Alt-Regensberg Castle was built by the House of Regensberg.

Of the rest of the land, 30.6% is settled (buildings or roads) and the remainder (2.3%) is non-productive (rivers, glaciers or mountains).

[13][14] Regensdorf-Watt railway station is a stop of the Zürich S-Bahn, on the lines S6, S21 and SN6.

Between Zürich Oerlikon and Herrliberg-Feldmeilen, the S6 combines with the S16 to provide a frequency of one train every fifteen minutes.

[15] The service operates on weekdays during peak hours; there are a total of eight trains in each direction per day.

There is also the SN6, a night train that runs a single service between Zürich Tiefenbrunnen and Regensdorf-Watt, where it terminates.

[18] The nearest Zürich trolleybus option is line 46, which is accessed at the intersection of Geeringstrasse and Rütihofstrasse, about 1.3 miles (2.1 km) to the southeast in Höngg.

FC Regensdorf, an amateur football club, play at the Sportanlage Wisacher on Wiesackerstrasse.