Ida Quaiatti (sometimes Cajatti) (1890 – February 1, 1962) was an Italian lyric soprano known especially for her performances in the work of Giacomo Puccini.
Born in Split, Quaiatti studied music at the conservatory in Trieste, making her operatic debut in that city as Frasquita in Carmen in 1907. Two years later she sang the title role in Madama Butterfly in Ascoli Piceno, and soon thereafter performed in La bohème at the Teatro Sociale in Bergamo. In 1912 she won plaudits for her performance of Amilcare Ponchielli's Lina in Cremona. During her career she would go on to sing in such works as Otello and Falstaff of Giuseppe Verdi; Lohengrin and Der fliegende Holländer of Richard Wagner; La Wally and Loreley of Alfredo Catalani; Lodoletta, Cavalleria rusticana and L'amico Fritz of Pietro Mascagni; Andrea Chénier and Fedora of Umberto Giordano,Mefistofele of Arrigo Boito; and Manon of Jules Massenet. She would eventually perform in most of the major Italian houses. In 1913 she created the role of Mimi in the premiere of Mimi Pinson, the revised version of Ruggiero Leoncavallo's La bohème, in Palermo.