Gianina Krucker (née Ernst (born 31 December 1998) is a former German ski jumper.

[1] Gianina Ernst was born in Winterthur, Switzerland, to a German-Swiss family.

[2] Her father, Joachim Ernst, was a ski jumper and German champion who, during FIS Nordic World Ski Championships 1982 in Oslo, finished 11th on the K70 hill and 38th on the K90 hill.

[2][3] Her mother, Cornelia Thomas, was a Swiss cross country skier, who represented Switzerland at the 1980 Winter Olympics and 1982 World Championship.

Her brother, Benjamin Ernst (born 21 March 1995), is also a ski jumper.