Julia Efremova ne Vorobieva (born 14 February 1985 in Kursk) is a Russian professional tennis player. She played under her maiden name of Vorobieva (aka Vorobeva) until February 2006. She married her coach Alexey Efremov and returned to the ITF circuit in March 2007.
She has won 11 ITF Women's Circuit titles in her career, of which 1 is in singles and 10 in doubles.