Alexandra Flood (born 26 February 1990) is an Australian operatic soprano.
Born in Cowes, Victoria, Flood attended the Methodist Ladies' College, Melbourne and studied from 2007 until 2010 at the University of Melbourne (B. A., Diploma in Music). In 2011, she gained a Graduate Diploma of Journalism at the Royal Melbourne Institute of Technology. She then continued from 2014 to 2016 at the Hochschule für Musik und Theater München (Master's degree in Music Theatre).
In 2014 she was awarded a Mike Walsh Fellowship.
Flood was part of the 2014 Salzburg Festival's Young Singers Project and made her European stage debut there as Blonde in a production for children of Mozart's Die Entführung aus dem Serail and as Modistin in Richard Strauss's Der Rosenkavalier. Her first leading role was Marguerite in May 2015 in Le petit Faust by Hervé at the Staatstheater am Gärtnerplatz, Munich. This was followed in October by the title role in Janáček's The Cunning Little Vixen for Pacific Opera, Sydney.