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

Nisterau belongs to the Verbandsgemeinde of Bad Marienberg, a kind of collective municipality.

About 1300, Pfuhl had its first documentary mention, with Bach's name first appearing in writing in 1416.

Running right near the community is Bundesstraße 414, leading from Driedorf-Hohenroth to Hachenburg.

The nearest InterCityExpress stop is the railway station at Montabaur on the Cologne-Frankfurt high-speed rail line.