Oitz is a town and municipality in the province and autonomous community of Navarre, in northern Spain. It is situated in the Basque-speaking area of Navarre, within the comarca of Malerreka in the northwestern part of the region.
Like other municipalities in Navarre, Oitz is administered as a local entity (municipio) with its own town council. The surrounding area is characterised by the green, mountainous terrain typical of the western Pyrenean foothills, and the town lies close to the Baztan valley and the Bidasoa river basin.
Oitz is one of the smaller municipalities in Navarre, with a population of a few hundred residents. Its official name is the Basque form, Oitz, reflecting the linguistic makeup of this part of the province.