The Eichener See lies in the Southern Black Forest Nature Park on the northeastern perimeter of the Dinkelberg ridge between the nearby village of Eichen to the west, which is part of the municipality of Schopfheim, the municipality of Hasel to the east-northeast and the town of Wehr to the southeast. It is located 2.5 km west of Erdmanns Cave (Hasler Höhle) in a shallow valley around 350 metres south of the Bundesstraße 518.