The municipality known as Jossgrund is located in the valley of the rivulet Jossa, a tributary to the Sinn which in turn discharges into the Franconian Saale shortly before the Saale flows into the river Main at Gemünden am Main. Jossgrund lies among the wooded hills of the Spessart at the border between the German federal states of Hesse and Bavaria (Main-Spessart district).