Costarainera () is a comune (municipality) in the Province of Imperia in the Italian region Liguria, located about southwest of Genoa and about southwest of Imperia. As of 31 December 2004, it had a population of 775 and an area of .All demographics and other statistics: Italian statistical institute Istat.
Costarainera borders the following municipalities: Cipressa and San Lorenzo al Mare.
Demographic evolution
References