Adiós is a municipality in the province and autonomous community of Navarre, in northern Spain. It lies within the historic Basque-speaking region of the country, in the comarca of Puente la Reina.
The settlement is a small rural village typical of the Navarrese countryside, with a population recorded as 147 in 2002. Its name, unusual for a Spanish town, is derived from the Basque word "adiós," meaning "farewell."