Busto Garolfo (Lombard: Büst Picul) is a comune (municipality) in the Metropolitan City of Milan of 13 978 inhabitants. Busto Garolfo is located in the Italian region Lombardy, placed about 25 kilometres (16 mi) northwest of Milan.

In the local dialect, belonging to Western Lombard, it is called Büst Picul ('Small Busto'), to distinguish it from Büsti Grandi ('Big Busto', which indicates the town of Busto Arsizio) and Büst(i) Cava (or Büscaa, i.e. Buscate).

The first mention of the village of Busto Garolfo is in a 992 AD document. At the end of the 13th century there were three altars in honor of Saints Bartholomew, Innocent and Margaret, in the ancient church of San Salvatore, which had been built by the aristocratic della Croce family which had owned land in the area since 1317.