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

The village is located in the northeast of Koblenz on the Westerwald Lake Plateau.

The residential community of Lochum belongs to the Verbandsgemeinde of Hachenburg, a kind of collective municipality.

The community lies between Bundesstraßen 255, linking Koblenz and Hachenburg, and 414, leading from Montabaur to Herborn.

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