Oleksandra Ryzhkova (born 9 July 1980) is a Ukrainian sprinter who specializes in the 400 metres.
In the 4 x 400 metres relay she competed at the 2003 World Championships and the 2004 Olympic Games without reaching the final.[1] [2]
Her personal best time was 51.75 seconds in the 400 metres, achieved in May 2005 in Kyiv.