Birmensdorf is a municipality in the district of Dietikon in the canton of Zürich in Switzerland.

Of the rest of the land, 20.2% is settled (buildings or roads) and the remainder (0.5%) is non-productive (rivers, glaciers or mountains).

As of 2007[update] 14.1% of the total municipal area was undergoing some type of construction.

The village of Birmensdorf includes the former hamlets of Wullikon, Schüren, Güpf, Uf Dorf and Risi.

[citation needed] In the federal election of 2023 the voting distribution was: SVP (33.3%), SP (15.2%), FDP (13.6%), GLP (12.3%), The Center (11%) and GPS (7.8%).

[5] The historical population is given in the following table:[3] Birmensdorf railway station is a stop of the Zürich S-Bahn on the lines S5 and S14.