Aeschi bei Spiez is a municipality in the Frutigen -Niedersimmental administrative district in the Canton of Bern in Switzerland .

Aeschi bei Spiez is first mentioned in 1228 as Asshes. In 1269 it was mentioned as (villa) Esche..

The earliest traces of settlements in the area include scattered La Tene era graves and individual prehistoric tools. During the Middle Ages, it was part of the Herrschaft of Mülenen, under the Lords of Kien. The Herrschaft then passed through several other nobles, including the Wädenswil and Turn families.