Ichnusa

Ichnusa may refer to:


 * an older Greek name for the island of Sardinia
 * Birra Ichnusa, a Sardinian beer brand owned by Heineken

Ships

 * Ichnusa (1986–1988); regional-class RO-RO passenger ferry operated by Tirrenia – Compagnia italiana di navigazione
 * Ichnusa; passenger ferry operated by Saremar
 * Ichnusa; RO-RO passenger cargo ferry built by Fincantieri – Cantieri Navali Italiani S.p.A.; see List of ships built by Fincantieri
 * Ichnusa; 19th-century Gulnara-class aviso of the Piedmontese Navy, see List of ships of the line of Italy

Animals

 * Aglais ichnusa, a butterfly found on Corsica and Sardinia
 * Ichnusa (cnidarian), an extinct genus of cnidarian from the Ediacaran of Italy