Fronhausen is a municipality in the south of Marburg-Biedenkopf district in the administrative region of Gießen in Hessen, Germany.

It was formed out of seven former communities in the early 1970s as part of Hessen's municipal reforms at that time.

The arms were chosen from many proposals put forth after the greater community was formed.

The bend sinister (the band) stands for the river Lahn, which flows through the community.

The wing comes from the historic Fronhausen reeves' arms, and the lozenges from the Stewards (Schenken) of Schweinsberg, who were formerly the local nobility; the number of lozenges – seven – also represents the number of constituent communities.