Lumpiaque is a municipality in the province of Zaragoza, within the autonomous community of Aragon in northeastern Spain. It lies in the Ebro river valley area of the province, in a region characterised by a semi-arid continental climate and extensive agriculture.
According to the 2004 census carried out by Spain's national statistics institute (INE), the municipality had a population of 900 inhabitants. Like many small municipalities in rural Aragon, it is administered by a local council (ayuntamiento) and forms part of the wider comarca system of local government used in the region.