Allmendingen is first mentioned in 1256 as Alwandigen under the control of Rudolf von Alwandingen.

[4] Some traces of a prehistoric settlement and High Medieval fortifications were discovered in the Hüenliwald.

During the High Medieval period, Allmendingen Castle was built in the village.

In 1528, the city of Bern adopted the new faith of the Protestant Reformation and began imposing it on the Bernese Oberland.

After Bern imposed its will on the monastery, they secularized it and annexed all its lands, including Allmendingen.

Starting in the 17th century, Bernese patricians, trying to escape the city, built country manor houses in Allmendingen.

These included the 1607 Neue Schloss for Kaspar von Graffenrieds and the 1723 Märchligen Estate for Samuel Morlot, both of which were used as summer residences.

On the following day, 1 January 2010, it joined the newly created Verwaltungskreis Bern-Mittelland.

[7] The blazon of the municipal coat of arms is Per Chevron embowed Sable and Argent.

[11] Most of the population (as of 2000[update]) speaks German (471 or 95.2%) as their first language, French is the second most common (7 or 1.4%) and English is the third (7 or 1.4%).

The historical population is given in the following chart:[3][14][15] The Noble's Manor House, the Alter Sandacker and the Villa at Bergliweg 11 are listed as Swiss heritage site of national significance.

In the tertiary sector; 76 or 62.8% were in wholesale or retail sales or the repair of motor vehicles, 9 or 7.4% were in the movement and storage of goods, 13 or 10.7% were in a hotel or restaurant, 2 or 1.7% were technical professionals or scientists, 4 or 3.3% were in education.

[11] From the 2000 census[update], 51 or 10.3% were Roman Catholic, while 371 or 74.9% belonged to the Swiss Reformed Church.

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.

[20] During the 2009–10 school year, there were a total of 35 students attending classes in Allmendingen.