Alpartir is a municipality in the province of Zaragoza, within the autonomous community of Aragon, Spain. It is located in the comarca of Valdejalón, roughly 50 kilometres southwest of the provincial capital, Zaragoza.
The municipality covers a largely rural area of the Iberian System foothills, with a landscape of cereal fields, almond and olive groves, and low hills. According to the 2004 census (INE), Alpartir had a population of 603 inhabitants.