 On the west, the Urola River separates it from the neighboring Urrechu, with which it forms an urban area.In the south, it borders with Legazpia and Gaviria, in the west with Ezkio-Itsaso, and in the north with Azpeitia and Azcoitia.The main mountains of Zumárraga are Samiño (), Izazpi (), and Beloqui ().