Peralta de Calasanz (Spanish: [peˈɾalta ðe kalaˈsanθ]) or Peralta de Calassanç (Catalan: [peˈɾalta ðe kalaˈsans]) is a municipality located in the province of Huesca, Aragon, Spain.

According to the 2004 census (INE), the municipality has a population of 274 inhabitants.

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