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

In 1466, the city of Solothurn inherited all the vom Stein holdings, including Hermiswil.

The Roman Catholic citizens of Hermiswil were placed under the guidance of the Reformed parish of Herzogenbuchsee.

Painter Cuno Amiet lived the second part of his life in this hamlet of Seeberg.

Of the rest of the land, 6.5% is settled (buildings or roads) and the remainder (0.7%) is non-productive (rivers, glaciers or mountains).