Peio (Péj in local dialect) is a comune (municipality) in Trentino in the northern Italian region Trentino-Alto Adige/Südtirol, located about 80 kilometres (50 mi) northwest of Trento.

[3] Peio borders the following municipalities: Martell, Valfurva, Rabbi, Ponte di Legno, Vermiglio, Ossana and Pellizzano.

Peio was, till recent decades, a hamlet in the mountains, which sustained itself on agriculture and cattle raising.

Another important factor of Peio's touristic development is its location in Stelvio National Park, a vast mountain zone where vegetal and animal biodiversity is strictly preserved.

Easy walks and more difficult trekking routes allow visitors to explore valleys and woodlands from Passo del Tonale to Ortles.