San Mateo de Gállego (Aragonese: Sant Mateu de Galligo) is a municipality located in the province of Zaragoza, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 3100 inhabitants.
41°50′N 0°46′W / 41.833°N 0.767°W / 41.833; -0.767
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