Yana Mykhailivna Dementieva (Ukrainian: Яна Михайлівна Дементьєва; born 23 October 1978 in Kharkiv) is a Ukrainian rower.

At the 2012 Summer Olympics Dementyeva won the gold medal in the quadruple sculls event with Kateryna Tarasenko, Anastasiya Kozhenkova and Nataliya Dovhodko.

At the 2004 Olympics, she was disqualified with her team after one of her teammates, Olena Olefirenko, tested positive for ethamivan.

[2] At the 2008 Summer Olympics, she reached the B final in the women's double sculls.

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