Rohrbachgraben is a municipality in the Oberaargau administrative district in the canton of Bern in Switzerland.

Rohrbachgraben was a municipality created out of widely scattered settlements and farms around the Rohrbach stream.

During the Middle Ages the entire region was part of a district of the land owned by the Abbey of St. Gall.

Of the rest of the land, 0.19 km2 (0.073 sq mi) or 2.9% is settled (buildings or roads), 0.01 km2 (2.5 acres) or 0.2% is either rivers or lakes.

[5] The municipality is a widely scattered collection of small farms and settlements without a central village.

It consists of the hamlets and farm houses of Flückigen, Gansenberg, Glasbach, Kaltenegg, Liemberg, Matten, Wald and Wil.

[6] The blazon of the municipal coat of arms is Impalled Argent a Bear rampant to sinister Sable langued and viriled Gules and Vert a Bar wavy of the first.

The historical population is given in the following chart:[3][13] In the 2011 federal election the most popular party was the SVP which received 37.6% of the vote.

In the tertiary sector; 11 or 44.0% were in wholesale or retail sales or the repair of motor vehicles, 2 or 8.0% were in a hotel or restaurant, 3 or 12.0% were technical professionals or scientists and 6 or 24.0% were in education.

[10] From the 2000 census[update], 11 or 2.5% were Roman Catholic, while 374 or 85.8% 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.

[17] During the 2009-10 school year, there were a total of 55 students attending classes in Rohrbachgraben.