Tirrenia is a frazione (parish) of Pisa, Italy with a population of 3,112 inhabitants. Immersed in the pine forest of the "Litorale Pisano" and in the coast of Ligurian Sea (even if the name of the village refers to Tyrrhenian Sea, in Italian Mar Tirreno), Tirrenia is situated in the centre of the coast of Tuscany and next to the Parco Naturale Migliarino, San Rossore, Massaciuccoli, between Pisa and Livorno.