Lerici Castle is a fortification with a polygonal base that stands in a dominant position on the rocky promontory of Lerici Inlet, in the province of La Spezia.

The castle was built beginning in 1152 and underwent numerous transformations by the maritime republics, mainly by the Republic of Genoa and, to a lesser extent, the Republic of Pisa, which contended for possession of the castle in the mid-13th century because of its strategic location. With the last modification in 1555 the castle ended up taking on its present appearance when, at the behest of the Genoese Offizio di San Giorgio work was completed and, to commemorate the event, the plaque still visible today on the entrance portal was applied.