Guckheim, mainly a residential community with a well-developed club life, lies in the low mountain range of the Westerwald, part of the Rhenish Slate Mountains, roughly 330 m above sea level. The community's highest point at 657 m above sea level is the Fuchskaute in the northeast Westerwald. Its lowest point at about 150 m above sea level is found in the Gelbachtal Valley between Kirchähr and Dies. The community belongs to the Verbandsgemeinde of Westerburg, a kind of collective municipality.