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

The community lies in the Westerwald between Koblenz and Siegen.

Alsbach belongs to the Verbandsgemeinde of Ransbach-Baumbach, a kind of collective municipality.

The community's arms are based on those formerly borne by the Counts of Wied, Alsbach's former overlords.

The nearby Brexbachtalbahn (railway) is no longer in service.