Gallur is a small town and municipality in the autonomous region of Aragón, Spain, within the province of Zaragoza. It lies on the right bank of the Ebro, on a plain that stretches from the west bank of the river toward the Moncayo massif, in an area known as the Somontano del Moncayo.
The town's setting on this plain places it in the Ebro basin of northeastern Spain, in the Somontano Moncayo district. The Ebro, one of the Iberian Peninsula's principal rivers, flows past the settlement on its right bank.