Yuliya Andreyevna Yefimova (Russian: Юлия Андреевна Ефимова), also romanizedEfimova, (born 3 April 1992) is a Russianswimmer from Taganrog. Efimova competed for Russia at the 2008 Beijing Olympics and the 2012 London Olympics. In London she won the bronze medal in the 200 metres Breaststroke. Yefimova beat the long course 50 m breaststroke world record at the Barcelona 2013 FINA World Championships, as well as winning the gold medal in the 50 m and 200 m breaststroke races at the same Championships. She currently holds world record in short course 50 m and 200 m breaststroke.
Yulia Efimova was reported to have failed a drug test. Her alleged positive test for DHEA, a prescription steroid banned in professional sports. On May 13, 2014 she was disqualified from October 31, 2013 till February 28, 2015. She was also stripped of her results and medals at the 2013 European Short Course Championships.