Forst-Längenbühl is a municipality in the administrative district of Thun in the canton of Bern in Switzerland.

[3] The oldest trace of a settlement in the area is the ruins of a Roman villa with a bath located in Seieried.

In 1541 the land and Zwing und Bann rights over Forst were half owned by the farmers of the village.

By the 18th century about two-thirds of the sparsely settled community were in the court of Gurzelen which was part of the Herrschaft of Burgistein.

Following the 1798 French invasion, Forst became part of the Helvetic Republic district of Oberseftigen.

After the collapse of the Republic and the 1803 Act of Mediation both parts of the community were combined and joined the newly created Thun District.

In the 20th century it formed a school district with Längenbühl and developed close relationships with the nearby municipality.

[5] The oldest trace of settlements in the area are several neolithic canoes which were discovered in both lakes in the municipality.

Other Bronze Age and La Tène artifacts indicate that the area remained inhabited in antiquity.

In 1380 the citizen of Thun, Johann von Zeinigen, inherited the Uetendorf lands, including Längenbühl.

Following the 1798 French invasion, Längenbühl became part of the Helvetic Republic district of Oberseftigen.

After the collapse of the Republic and the 1803 Act of Mediation it joined the newly created Thun District.

The most important boroughs are Dörfli, Allmid (Allmend), Chromen, Längmoos, and Riedhubel.

[10] Most of the population (as of 2000[update]) speaks German (98%) as their first language, French is the second most common (0.9%) and Italian is the third (0.2%).

In the tertiary sector; 9 or 20.5% were in wholesale or retail sales or the repair of motor vehicles, 13 or 29.5% were in a hotel or restaurant, 1 was a technical professional or scientist, 6 or 13.6% were in education.

This is followed by three years of obligatory lower Secondary school where the students are separated according to ability and aptitude.

During the same year, the lower secondary schools in neighboring municipalities had a total of 17 students from Forst-Längenbühl.