Adelaide Malanotte (1785 – 31 December 1832) was an Italian operatic contralto who performed in major opera houses in Italy from 1806–1821. She is best known for creating the title role in the world premiere of Gioachino Rossini's Tancredi in 1813. After her marriage, she performed under the name Adelaide Montresor. Her son, Giovanni Battista Montresor, had a career as a tenor and impresario in the United States. From 1812 until her death 20 years later she carried on an extra-marital affair with the poet Luigi Lechi.