Unterlangenegg is a municipality in the administrative district of Thun in the canton of Bern in Switzerland.

[3] During the Middle Ages the land and scattered farms were part of the Herrschaft of Heimberg.

On 11 November 1382, Rudolf II of Kyburg attempted an unsuccessful raid on Solothurn.

During the war, Bern captured many of the Kyburg lands and forced them to make an unfavorable peace.

As part of the peace treaty, in 1384 Bern acquired Heimberg lands including Unterlangenegg.

[4] The church helped Schwarzenegg grow into a local center, however it never became a municipality and today is divided between Unterlangenegg and Oberlangenegg.

The municipality is made up of half of the village of Schwarzenegg (shared with Oberlangenegg), the hamlets of Kreuzweg, Bach, Zulgport and Allmend as well as scattered farm houses.

On the following day, 1 January 2010, it joined the newly created Verwaltungskreis Thun.

[7] The blazon of the municipal coat of arms is Quartered Sable a Castle Argent dimidiated and of the last a Fir Tree Vert trunked and eradicated Gules.

[10] Most of the population (as of 2000[update]) speaks German (908 or 98.0%) as their first language, Serbo-Croatian is the second most common (5 or 0.5%) and Arabic is the third (4 or 0.4%).

[10] In 2012, single family homes made up 32.5% of the total housing in the municipality.

[15] The historical population is given in the following chart:[3][16][17] As of  2011[update], Unterlangenegg had an unemployment rate of 0.53%.

In the tertiary sector; 31 or 28.7% were in wholesale or retail sales or the repair of motor vehicles, 13 or 12.0% were in the movement and storage of goods, 5 or 4.6% were in a hotel or restaurant, 5 or 4.6% were technical professionals or scientists, 29 or 26.9% were in education and 18 or 16.7% were in health care.

[24] From the 2000 census[update], 813 or 87.7% belonged to the Swiss Reformed Church, while 34 or 3.7% were Roman Catholic.

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

Following the lower Secondary students may attend additional schooling or they may enter an apprenticeship.

The municipality's primary school had 45 students in German language classes.