Bonna Søndberg (born 17 August 1933) is a Danish former operatic soprano and singing educator. She first sung mezzo and made her on-stage debut as the housekeeper Marcellina in The Marriage of Figaro in 1955. Søndberg was employed by the Royal Danish Theatre one year later and she remained with the institution until her retirement in 1987. She is a Knight of the Order of the Dannebrog and a recipient of the Tagea Brandt Rejselegat.