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

There is also evidence of Roman buildings from approximately 200 CE near the current Reformed Church.

The first documented use of the name puhsa[4] (pronounced Buchsa, in Latin buxum, meaning "box") is found in the writings of Saint Gallus in 886 CE.

[4] It was ruled by Burgundy, the Zähringer, the Kyburger, and finally, brought under the Altberni sovereignty.

[6] Following the merger of Oberönz into Herzogenbuchsee, the new municipality has an area, as of 2009[update], of 9.83 km2 (3.80 sq mi).

[8] The blazon of the municipal coat of arms is Gules on a Bend Argent six Box Leaves Vert and in chief a Crown Or.

[6] The historical population is given in the following table:[4] The municipality has a railway station, Herzogenbuchsee, on the Olten–Bern line.