Hellsau is a municipality in the district of Burgdorf, in the canton of Bern, Switzerland.

[3] The earliest trace of a settlement at Hellsau is an early medieval cemetery near the Äbi farm house.

[3] For most of Hellsau's history, it was a village under the jurisdiction and town council of Koppigen.

Agriculture is still important in the village economy, though a construction company provides a number of jobs.

Starting in the 1820s Höchstetten and Hellsau formed a school district.

On 31 December 2009 Amtsbezirk Burgdorf, the municipality's former district, was dissolved.

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

[6] The blazon of the municipal coat of arms is Vert a Bend wavy Or and in a Chief Argent three Pales Gules.

The historical population is given in the following chart:[3][13] As of  2011[update], Hellsau had an unemployment rate of 0.08%.

In the tertiary sector; 4 or 23.5% were in wholesale or retail sales or the repair of motor vehicles, 4 or 23.5% were in a hotel or restaurant, 5 or 29.4% were technical professionals or scientists, 4 or 23.5% were in education.

[10] From the 2000 census[update], 10 or 5.2% were Roman Catholic, while 156 or 80.8% 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.

[16] During the 2009-10 school year, there were a total of 31 students attending classes in Hellsau.