Arbizu is a village and municipality in the province and autonomous community of Navarre, in northern Spain. It lies in the northern part of the country, in the Basque-influenced region of Navarre, and its nearest neighbouring settlement is Etxarri-Aranatz.
The village observes its traditional fiesta on 24 June, St John's Day. The celebration is noted for the feast held in the main square, which forms the centre of the local festivities.