The American mezzo-soprano Barbara Dever (born 1952) is an well-known opera singer who has appeared with Luciano Pavarotti, Plácido Domingo, Zubin Mehta, Nello Santi and James Levine.

Dever made her Metropolitan Opera debut in 1994, as Amneris in Aida. Other roles at the Met include Azucena in Il Trovatore, Ulrica in Un Ballo in Maschera, Eboli in Don Carlo, and Fricka in Die Walküre (1993 Japan tour under James Levine).

She has sung at the Washington Opera, New National Theater (Tokyo), Michigan Opera Theatre, Teatro Lirico di Cagliari, Teatro Massimo (Palermo; Grand Reopening), La Scala, Vienna State Opera, Berlin State Opera, Colón Theater, Arena di Verona and the Cincinnati Opera.

Dever's performances have taken her to Montreal, Mexico City, Macerata, Parma, Reykjavik, San Diego, Antwerp, Puerto Rico, Palermo, Vancouver, Santiago, Berlin, and Buenos Aires.

She has performed with the State Symphony Orchestra of Sao Paulo, the Louisville Orchestra at Chautauqua, the Florida Philharmonic, the Israel Philharmonic Orchestra, the Pacific Symphony, the Netherlands Radio Orchestra and the National Orchestra of Mexico.

Dever sang at a Lincoln Center live concert telecast with Pavarotti and performed the role of Dalila opposite Plácido Domingo's Samson in 1998 (Mexico City).