Horgen is also the type-site of Switzerland's middle Neolithic archaeological culture.

Of the rest of the land, 20.4% is settled (buildings or roads) and the remainder (2%) is non-productive (rivers, glaciers or mountains).

As of 2007[update], 16% of the total municipal area was undergoing some type of construction.

Most of the population (as of 2000[update]) speaks German (79.9%), with Italian being second most common ( 5.7%) and Albanian being third ( 2.8%).

[5] The historical population is given in the following table:[3] The A3 motorway passes through the municipality and has a junction in the south of the town.

Of these two are relatively close to each other in the lakeside part of the municipality, while the other is some distance away from the centre of the town in the Sihl Valley:[7][8] The Zimmerberg bus line (Zimmerbergbus), provided by the Sihltal Zürich Uetliberg Bahn (SZU), connects the Zimmerberg region and parts of the Sihl Valley.

In the summer there are regular boats to Zürich-Bürkliplatz as well as along the lake to Rapperswil, run by the Zürichsee-Schifffahrtsgesellschaft.

The determination of the room height can in turn be traced back to circles with a diameter of 17 meters.

Haltiner consistently leads this curved floor plan into the roof.