Paruzzaro is a comune (municipality) in the Province of Novara in the Italian region of Piedmont , located about 100 kilometres (62 mi) northeast of Turin and about 30 kilometres (19 mi) north of Novara.

Paruzzaro borders the following municipalities: Arona, Gattico-Veruno, Invorio , and Oleggio Castello . The municipal territory is home to the Romanesque church of San Marcello (late 10th-early 11th century). There is a fresco cycle by 15th–16th-century local artists in the church. Another noteworthy monument is the church of San Siro.