Spiez (German pronunciation: [ʃpiːts]) is a town and municipality on the shore of Lake Thun in the Bernese Oberland region of the Swiss Canton of Bern . It is part of the Frutigen -Niedersimmental administrative district. Besides the town of Spiez, the municipality also includes the settlements of Einigen, Hondrich, Faulensee, and Spiezwiler.

The official language of Spiez is (the Swiss variety of Standard) German, but the main spoken language is the local variant of the Alemannic Swiss German dialect.

Spiez is first mentioned around 761-62 as Spiets.

The area between the Kander and Lake Thun in modern Spiez was home to several large Bronze and Iron Age settlements.