Karina Vnukova (born 27 March 1985 in Vilnius, Lithuania) is a Lithuanian high jumper.

She finished eighth at the 2001 World Youth Championships. She later competed at the 2007 European Indoor Championships and the 2008 Olympic Games without reaching the final.^[1]

Her personal best is 1.87 metres, achieved in July 2008 in Strasbourg. She has 1.91 metres on the indoor track, achieved in January 2008 in Vilnius.^[1]