Raina Kabaivanska (Bulgarian: Райна Кабаиванска) (December 15, 1934) is a Bulgarian opera singer, one of the leading lirico-spinto sopranos of her generation, particularly associated with Verdi and Puccini, although she sang a wide range of roles.

Born Raina Yakimova in Burgas, Bulgaria, she studied in Sofia with Prokopova and Yosifov, and made her debut at the Bulgarian National Opera in Sofia as Tatjana in Tchaikovsky's Eugene Onegin in 1957. The following year, she left for Italy for further studies with Zina Fumagalli-Riva in Milan and with Giulia Tess in Vercelli. Two years later she made a breakthrough in Fano, Italy, as Nedda in Leoncavallo's Pagliacci. In 1961, she gave her first performance at La Scala in Milan, as Agnese in Bellini's Beatrice di Tenda, opposite Dame Joan Sutherland. She sang widely in Italy, Genoa, Venice, Parma and notably in Turin in 1973, as Elena in I vespri siciliani, in the only production ever directed by Maria Callas.

In 1962, she made her debuts at both the Royal Opera House in London, as Desdemona in Verdi's Otello, and the Metropolitan Opera in New York, as Nedda. She went on performing at the Bolshoi Theatre in Moscow, the Teatro Colón in Buenos Aires, the Paris Opéra, the Vienna State Opera, the Budapest Opera, the Lyric Opera of Chicago, the San Francisco Opera, the Dallas Opera, the Teatro dell'Opera di Roma, etc.

She also appeared in a few opera films, notably Pagliacci, opposite Jon Vickers in 1968, Il trovatore, opposite Franco Bonisolli, in 1975, and Tosca, opposite Plácido Domingo, in 1976.

A versatile singer with a beautiful voice and fine musicianship, she is also a singing-actress of considerable ability.