法伊翁（西班牙语：Fayón），是西班牙阿拉贡自治区萨拉戈萨省的一个市镇。 总面积67平方公里，总人口396人（2001年），人口密度6人/平方公里。

Fayón (Spanish: [faˈʝon]) or Faió (Catalan: [fəˈjo], locally: [faˈjo]) is a municipality located in the province of Zaragoza, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 395 inhabitants. This town is located between the Ebro and the Matarranya rivers in La Franja area; the local dialect is a variant of Catalan.