Eleonore Henriette Magdalena Grabau-Bünau, also Henriette Grabau or Henriette Bünau, (29 March 1805 – 28 November 1852) was a German operatic alto and mezzo-soprano. For twelve years she was the main singer at the Leipzig Gewandhaus and from 1843 to 1849 she was the first teacher at the Leipzig Conservatory.