Gemma di Vergy is an 1834 tragedia lirica (tragic opera) in two acts by Gaetano Donizetti from a libretto by Giovanni Emanuele Bidera.

The heroine is the childless wife of the Count of Vergy, and the plot deals with her jealousy and grief as her husband arranges an annulment of their marriage in preparation for the arrival of his new bride, Ida, and her despair following the murder of her husband by a slave, Tamas, who is secretly in love with her.

[2] It was not performed at the Teatro di San Carlo in Naples until 4 March 1837, but it remained popular there and appeared every year until 1848.

[3] Productions were also staged in London on 12 March 1842, Paris, New York City on 2 October 1843, Lisbon, St. Petersburg, Vienna and Barcelona.

Gemma di Vergy was revived for the soprano Montserrat Caballé in a production at the Teatro San Carlo in Naples in December 1975.