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

During the 19th century the population grew as people found jobs in straw plaiting and horse hair spinning to supplement the income from agriculture.

However, in the 20th century, the population declined as residents emigrated in search of jobs as agriculture became less manpower intensive.

It consists of the village of Reisiswil and scattered hamlets including Gstell, Gemeindeweid and Adlihubel.

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

[6] The blazon of the municipal coat of arms is Argent a Torch Sable incensed Gules issuant from a Mount of 3 Coupeaux Vert.

[10] Most of the population (as of 2000[update]) speaks German (188 or 95.4%) as their first language, French is the second most common (4 or 2.0%) and Albanian is the third (2 or 1.0%).

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 67.8% of the vote.

The number of jobs in the primary sector was 21, of which 18 were in agriculture and 2 were in forestry or lumber production.

In the tertiary sector; 5 or 22.7% were in wholesale or retail sales or the repair of motor vehicles, 6 or 27.3% were in the movement and storage of goods, 6 or 27.3% were in a hotel or restaurant, 1 was in the information industry, and 3 or 13.6% were technical professionals or scientists.

[10] From the 2000 census[update], 10 or 5.1% were Roman Catholic, while 156 or 79.2% 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 10 students attending classes in Reisiswil.