Val Poschiavo (Lombard: Pus'ciaf, German: Puschlav, pronounced [pʊʃˈlaːf] ) is a valley in the southern, Italian-speaking part of the Swiss canton of the Grisons . The main town is Poschiavo. The valley is known for its distinctive microclimate that supports a diverse agricultural landscape, ranging from alpine pastures in the north to orchards and small arable plots in the south. Since 2010, Val Poschiavo has emerged as Switzerland 's leading region for organic farming, with over 83% of its agricultural land certified organic by 2021. The valley is served by the scenic Bernina Railway, part of the UNESCO World Heritage Rhaetian Railway, which connects the Upper Engadine to Tirano in Italy's Valtellina region.

Val Poschiavo is a glacial trough valley running roughly north–south for about 25 km in the southern Alps.