Fonz is a municipality located in the province of Huesca, Aragon, Spain. It had a population of 960 inhabitants in 2014. Fonz is located south of …Fonz is a municipality located in the province of Huesca, Aragon, Spain. It had a population of 960 inhabitants in 2014. Fonz is located south of the Pyrenees mountains in Aragon, near Catalonia. The region where it is located is the Middle Cinca and the biggest nearby towns are Monzón and Barbastro.