Röthenbach bei Herzogenbuchsee is a municipality in the district of Wangen in the canton of Bern in Switzerland.

[1] Before the merger, Röthenbach bei Herzogenbuchsee had an area of 2.1 km2 (0.81 sq mi).

Of the rest of the land, 10.2% is settled (buildings or roads) and the remainder (0.5%) is non-productive (rivers, glaciers or mountains).

[2] Before the merger, Röthenbach bei Herzogenbuchsee had a population (as of 2007[update]) of 338, of which 1.2% are foreign nationals.

Most of the population (as of 2000[update]) speaks German (98.7%), with French being second most common ( 0.6%) and Italian being third ( 0.3%).