Isenfluh is a hamlet in Switzerland, north of the road from Wilderswil to Lauterbrunnen.

It is first mentioned in 1319 as Ysenfluo and in 1401 people from the Lötschental started to settle in the small hamlet.

The infrastructure of Isenfluh is installed, but a lot of the support comes from self-help groups.

The main road (and bus route), Churchischlief, to Isenfluh traverses a 1,200-metre (0.75 mi) spiral tunnel.

This opened in 1992 and replaced a previous mountain road destroyed by a 1987 landslide.