Carlotta Marchisio (8 December 1835 – 28 June 1872) was an Italian operatic soprano and one of Rossini's favorite singers.
Her elder sister, Barbara Marchisio was a noted contralto and their brother Antonino was a composer.
Carlotta made her debut as Adalgisa in Bellini's Norma at the Teatro Real in Madrid in March 1857.
She frequently appeared with her sister Barbara, singing leading soprano and contralto roles in Paris (at the Théâtre-Italien) as well as in Brussels, Berlin, Moscow, Saint Petersburg, and various theatres in Great Britain.
In 1861, she married the Austrian bass Eugen Kuhn, who performed under the name Eugenio Cosselli.