Niederahr
Municipality
Coat of arms
Location of Niederahr within Westerwaldkreis district
Niederahr Show map of Germany Niederahr Show map of Rhineland-Palatinate
Coordinates: 50°29′31″N 7°51′40″E / 50.49194°N 7.86111°E / 50.49194; 7.86111
Country	Germany
State	Rhineland-Palatinate
District	Westerwaldkreis
Municipal assoc.	Wallmerod
Government
• Mayor (2019–24)	Jürgen Eulberg[1]
Area
• Total	4.03 km2 (1.56 sq mi)
Elevation	300 m (1,000 ft)
Population  (2022-12-31)[2]
• Total	816
• Density	200/km2 (520/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
Postal codes	56414
Dialling codes	02602
Vehicle registration	WW
Website	www.wallmerod.de

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

The community lies in the Westerwald between Montabaur and Hachenburg. Through the community flows the Ahrbach. The community belongs to the Verbandsgemeinde of Wallmerod, a kind of collective municipality. Its seat is in the like-named town.

In 959, Niederahr had its first documentary mention.

The municipal council is made up of 12 council members who were elected in a majority vote in a municipal election on 13 June 2004.

Right through the community runs Bundesstraße 255, linking Montabaur and Rennerod. The nearest Autobahn interchange is Montabaur on the A 3 (Cologne–Frankfurt), some 5 km away. The nearest InterCityExpress stop is the railway station at Montabaur on the Cologne-Frankfurt high-speed rail line.

Westfalia Separator makes decanters at its Niederahr works.

• Niederahr (in German)