Ekaterina Illarionovna Kalinchuk (née Dyomina; Russian: Екатерина Илларионовна Калинчук (Дёмина-); 2 December 1922 – 13 July 1997) was a Soviet gymnast. She competed at the 1952 Summer Olympics in Helsinki, where she was a non-scoring member of the gold-winning Soviet team. Individually she won a gold medal in the vault and a silver in the now-discontinued team portable apparatus event.
|Country represented||Soviet Union|
|Born||2 December 1922|
Zhitovo, Tula Oblast, Russian SFSR
|Died||13 July 1997 (aged 74)|
|Discipline||Women's artistic gymnastics|
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