Joyce DiDonato (née Flaherty; born February 13, 1969) is an American opera singer and recitalist. A coloratura mezzo-soprano, she has performed operas and concert works spanning from the 19th-century Romantic era to those by Handel and Mozart.

Educated at Wichita State University and the Academy of Vocal Arts, DiDonato began her career in mid-1990s, participating in young artist programs of several opera companies, most notably Houston Grand Opera. Since then, she began having engagements across the United States and Europe. She made debuts at La Scala in Rossini's La Cenerentola in the 2000/01 season, the Royal Opera in Janáček's The Cunning Little Vixen in 2003, and the Metropolitan Opera as Cherubino in Mozart's The Marriage of Figaro in the 2005/06 season. She has performed in world premieres of several operas, such as Michael Daugherty's Jackie O (1997), Mark Adamo's Little Women (1999/2000), Jake Heggie's Great Scott (2015), and Kevin Puts's The Hours (2022).

DiDonato has won multiple awards including the 2012, 2016 and 2020 Grammy Award for Best Classical Vocal Solo.