Lohnstorf is a former municipality in the Bern-Mittelland administrative district in the Canton of Bern in Switzerland . On 1 January 2020 the former municipalities of Kirchenthurnen , Lohnstorf and Mühlethurnen merged to form the municipality of Thurnen.

Lohnstorf is first mentioned in 1148 as Lonestrof. In 1279 it was mentioned as Lonstorf.

The oldest trace of a settlement is in Brühl, where the ruins of a Roman era settlement were found. By the 13th-14th century a number of Bernese patrician families owned land and rights in the village and surrounding farms.