Lucinasco () is a comune (municipality) in the Province of Imperia in the Italian region Liguria, located about southwest of Genoa and about northwest of Imperia. As of 31 December 2004, it had a population of 268 and an area of .
The municipality of Lucinasco contains the frazione (subdivision) Borgoratto.
Lucinasco borders the following municipalities: Borgomaro, Chiusanico, Chiusavecchia, Pontedassio, and Vasia.