Ada Sari (29 June 1886 – 12 July 1968) was a Polish opera singer, actress, and educator. One of the leading coloratura sopranos of her generation, she possessed a large, resonant voice with a clear timbre. Her career took her to the stages of the best opera houses and concert halls in Europe during the first half of the 20th century. Her signature roles included Gilda in Rigoletto, Mimi in La bohème, Rosina in The Barber of Seville, Violetta in La traviata, and the title roles in Lakmé and Lucia di Lammermoor. She also gave lauded concert tours in North and South America.