Perinaldo is a comune (municipality) in the Province of Imperia in the Italian region Liguria, located about 120 kilometres (75 mi) southwest of Genoa and about 30 kilometres (19 mi) west of Imperia.
It is the birthplace of the 17th-century Italian astronomer Giovanni Domenico Cassini.
- Parish church of San Nicola da Bari, built in 1489. It houses a 15th-century wooden crucifix.
- Church of Sant'Antonio abate (1590–1600)
- Sanctuary of the Visitation (17th century)
- Astronomical observatory