Hattgenstein is an Ortsgemeinde – a municipality belonging to a Verbandsgemeinde, a kind of collective municipality – in the Birkenfeld district in Rhineland-Palatinate, Germany. It belongs to the Verbandsgemeinde of Birkenfeld, whose seat is in the like-named town.

The municipality lies at the edge of the Schwarzwälder Hochwald (forest) in the Hunsrück, and 72.2% of the municipal area is wooded. There is a widespread misconception that Hattgenstein, with its average elevation of 534 m above sea level, is the highest place in Rhineland-Palatinate, but this is not true. There are a few places, such as Stein-Neukirch in the High Westerwald and Nürburg in the Eifel, that are higher.

To the northeast lies Schwollen, and to the south, Oberhambach.

Also belonging to Hattgenstein are the outlying homesteads of Helmhof, Waldfriede and Zur Zimmerei.

The council is made up of 6 council members, who were elected by majority vote at the municipal election held on 7 June 2009, and the honorary mayor as chairman.

Hattgenstein's mayor is Udo Laube, re-elected in 2019.

The municipality's arms might in English heraldic language be described thus: Over a base countercompony gules and argent, gules on a mount vert the Hattgenstein Glockenhaus argent with timber framing sable and doors and windows of the field.

The following are listed buildings or sites in Rhineland-Palatinate’s Directory of Cultural Monuments: