Darkhan Argynovich Bayakhmetov (Kazakh: ?????? ???????? ?????????; born August 21, 1985 in Oskemen, Shyrgys Qazaqstan) is an amateur Kazakh Greco-Roman wrestler, who played for the men's welterweight category.
He won a gold medal for his division at the 2009 Asian Wrestling Championships in Pattaya, Thailand, and silver at the 2010 Asian Games in Guangzhou, China.Bayakhmetov made his official debut for the 2008 Summer Olympics in Beijing, where he competed in the men's 66 kg class.
Because his opponent advanced further into the final match, Bayakhmetov automatically qualified for the bronze medal bout, where he was defeated by Belarus' Mikhail Siamionau, with a three-set technical score (2–0, 1–1, 1–1), and a classification point score of 1–3.At the 2012 Summer Olympics in London, Bayakhmetov lost the preliminary round of sixteen match of the men's 66 kg class to Lithuania's Edgaras Venckaitis, with a technical score of 2–6.