Claino con Osteno (Comasco: Scin Osten ) is a comune (municipality) in the Province of Como in the Italian region of Lombardy, located about 60 km north of Milan and about 20 km north of Como. It is a small comune on Lake Lugano, composed of a series of small frazioni (hamlets): the biggest ones (Claino and Osteno) have been chosen for the municipal name. Claino con Osteno borders the following municipalities: Alta Valle Intelvi, Laino, Ponna, Porlezza, Valsolda. Near Osteno is a site with numerous late-Jurassic fossils characterized by integral fossilization, including the Squaloraja polyspondyla.