Peio is a comune in Trentino in the northern Italian region Trentino-Alto Adige/Südtirol, located about 80 kilometres northwest of Trento. As o…Peio is a comune in Trentino in the northern Italian region Trentino-Alto Adige/Südtirol, located about 80 kilometres northwest of Trento. As of 31 December 2004, it had a population of 1,892 and an area of 162.3 square kilometres.