Katherine Ciesinski (born October 13, 1950) is an American mezzo-soprano, stage director, and voice professor. Ciesinski was born to Delaware Sports Hall of Famer and Katherine Hansen Ciesinski. She is the sister of opera singer Kristine Ciesinski (1952-2018). Her early studies in piano and voice were locally in Delaware, then at Temple University and the Curtis Institute of Music with Margaret Harshaw and Dino Yannopolous. In 1974, she won the Gramma Fischer Award at the Metropolitan Opera National Council Auditions and the following year, the WGN Auditions of the Air. In 1977, she took first prize at the by unanimous decision of the jury, while a year earlier having won first prize at the Geneva International Music Competition. Her sister Kristine won the same prize the following year