Eliza Biscaccianti (1824, Boston " July 1896, Paris) was an American operatic soprano from Boston, Massachusetts. Born Eliza Ostinelli, she was the daughter of pianist Sophia Hewitt and the Italian violinist and conductor Louis Ostinelli. Her father was a conductor of the Handel and Haydn Society. Her uncle was composer John Hill Hewitt and her grandfather was conductor, composer and music publisher James Hewitt.
From 1842-1847 Biscaccianti studied singing in Italy, most notably with Giuditta Pasta. She made her professional opera debut at Teatro Lirico in Milan in May 1847 as Elvira in Ernani. While in Italy she married the Italian cellist Count Alessandro Biscaccianti. They returned to the United States in late 1847 when Biscaccianti was offered a contract at the Astor Opera House in New York City. She made her debut at the Astor opera house as Amina in La sonnambula. She was later heard that season in the title role of Lucia di Lammermoor.