Klára Killermann (also known as Killermann-Bartos) (born 23 June 1929 in Tatabánya, died 16 July 2012[1]) was a breaststroke swimmer from Hungary.

She first won a national championship in 1942, as a 13-year-old, to the big surprise of the Hungarian swimming sport, which at that time was world-famous.

At the Helsinki Olympics, in 1952, she had exactly the same time as the third placed Helen Gordon 2.57,6, but according to the judges, she was placed fourth, and did not win the bronze medal.

Her granddaughter Viktória married Prince Jaime, Count of Bardi, the son of Princess Irene of the Netherlands, herself a sister of the former Queen Beatrix.

Jaime and Viktória's oldest daughter, Princess Zita Clara, is named in her memory.