Caterino Tommaso Mazzolà (18 January 1745 at Longarone – 16 July 1806 in Venice) was an Italian poet and librettist. Born into a wealthy family from the islands of Murano, he and his family moved to Venice around 1767, but after a few years he moved to Treviso. He married in 1780 and having already met Giacomo Casanova and Lorenzo Da Ponte, started work as a librettist.