Angelo (Анджело in Cyrillic; Andželo in transliteration) is an opera in four acts by César Cui, composed during 1871-1875, with a libretto by Viktor Burenin based on Victor Hugo's prose play, Angelo, tyran de Padoue. This same play formed the basis of Saverio Mercadante's Il giuramento of 1837, Amilcare Ponchielli's La Gioconda, which premiered in the same year as Cui's opera (1876), and Alfred Bruneau's Angelo, tyran de Padoue of 1928.

Angelo was premiered on 1 February 1876 in Saint Petersburg at the Mariinsky Theatre. The conductor was Eduard Nápravník. Apparently it did not survive that particular season, and was removed from the repertory.

A new production of Angelo was staged twenty-five years after the original premiere in 1901 at the Bolshoi Theatre in Moscow, with Feodor Chaliapin in the role of Galeofa. The Mariinsky staged Angelo again in 1910.