Holler is an Ortsgemeinde – a community belonging to a Verbandsgemeinde – in the Westerwaldkreis in Rhineland-Palatinate, Germany.

The community lies in the Westerwald south of Montabaur in the Nassau Nature Park.

The wavy bend sinister evokes the wealth in water that the community boasts, and the mills.

The Holler Volunteer Fire Brigade was founded on 29 March 1925, and it likewise ensures firefighting and general aid in the Ortsgemeinden of Daubach, Stahlhofen and Untershausen.

The brigade's fleet includes a command unit (Einsatzleitwagen, ELW 1) and a small fire engine (Tragkraftspritzenfahrzeug, TSF).