The Tyrrhenian Sea (/tɪˈriːniən/; Italian: Mar Tirreno [mar tirˈrɛːno], French: Mer Tyrrhénienne [mɛʁ tiʁenjɛn], Sardinian: Mare Tirrenu, Corsican: Mari Tirrenu, Sicilian: Mari Tirrenu, Neapolitan: Mare Tirreno) is part of the Mediterranean Sea off the western coast of Italy.
Ti Baybay Tirreno (/tɨˈriːniən ˈsiː/; Korso : Mari Tirrenu, Pranses: Mer Tyrrhénienne [mɛʁ tiʁenjɛn], Italiano: Mar Tirreno [mar tirˈrɛːno], Napolitano: Mar Tirreno, Sardo: Mare Tirrenu, Siciliano: Mari Tirrenu) ket parte ti Baybay Mediteraneo idiay akinlaud nga aplaya ti Italia.