Vierlas is a municipality located in Zaragoza Province, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 98 inhabitants.

Vierlas is located in the province of Zaragoza on the road between Tarazona and Tudela, known as El Tarazonica.

41°56′N 1°41′W / 41.933°N 1.683°W / 41.933; -1.683