Marineo is a comune in the Metropolitan City of Palermo in the Italian region Sicily, located about 20 kilometres south of Palermo. As of 31 …Marineo is a comune in the Metropolitan City of Palermo in the Italian region Sicily, located about 20 kilometres south of Palermo. As of 31 December 2004, it had a population of 6,885 and an area of 33.3 square kilometres.