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

Waldmühlen belongs to the Verbandsgemeinde of Rennerod, a kind of collective municipality.

Running right through the community is Bundesstraße 54, linking Limburg an der Lahn with Siegen.

The nearest Autobahn interchanges are Herborn and Haiger-Burbach on the A 45 (Dortmund–Gießen), and also Montabaur and Limburg-Nord on the A 3 (Cologne–Frankfurt), all between 20 and 25 km away.

The nearest InterCityExpress stops are the railway stations at Montabaur and Limburg-Süd on the Cologne-Frankfurt high-speed rail line.