Heidenrod lies in the western Taunus north of the main ridge and west of the Aar, between Koblenz and Wiesbaden, roughly halfway between the Rhine and the Lahn.

The municipal area stretches east and west of the high ridge along which runs Bundesstraße 260, also known as the Bäderstraße (“Bath Road”).

The Mappershainer Kopf, some 500 m northwest of its namesake place, is at 548 m above sea level the highest mountain in the Western Hintertaunus ("Farther Taunus").

Heidenrod's 19 Ortsteile, with population figures as of Nov 2012,[4] are Algenroth (77), Dickschied (473), Egenroth (172), Geroldstein (91), Grebenroth (346), Hilgenroth (103), Huppert (525), Kemel (1219), Langschied (238), Laufenselden (1894), Mappershain (246), Martenroth (67), Nauroth (582), Niedermeilingen (328), Obermeilingen (93), Springen (406), Watzelhain (362), Wisper (94) and Zorn (447).

The municipal election held on 6 March 2016[5][circular reference] yielded the following results: Heidenrod maintains partnerships with the following places: