Borso del Grappa is a commune of northeastern Italy (comune) with 5924 inhabitants (as of 31 December 2015) in the province of Treviso in Veneto. The municipality is located about 38.5 kilometers northwest of Treviso and is the westernmost municipality in the province part of the Comunità Montana del Grappa. Borso del Grappa is immediately adjacent to the province of Vicenza.