The main village of the comune, Fabbriche, was founded by ironworkers from Bergamo in the 14th century. The lesser villages of Vallico di Sopra and Vallico di Sotto are centuries older with surviving records going back to the eighth century. Originally called Vallivo or Vallibo, Vallico di Sopra (Upper Vallico) was the primary settlement but Vallico di Sotto (Lower Vallico) appeared in the 11th century.
By the 19th century Fabbriche had attracted a predominance of families from Vallico and from neighbouring parts of the Versilia mountains, the Middle Serchio valley and the Modenese Apennines. The population has steadily decreased since the late 19th century and is only about one quarter of what it was at that time.