Alfamén is a municipality in the province of Zaragoza, in the autonomous community of Aragon, Spain. It lies within the comarca of Campo de Cariñena, a district known for its wine production, in the Ebro valley region of northeastern Spain.
According to the 2016 census (INE), the municipality had a population of 1,466 inhabitants. Residents of Alfamén are known by the demonym "vena."
The town is reputed for its melons and watermelons, which are among its most notable local products.