Anatoly Yuryovych Onoprienko (Ukrainian: ???????? ???????? ??????????; Russian: ?????´??? ?´?????? ???????´???, Anatoly Yuryevich Onoprienko; July 25, 1959 – August 27, 2013) was a Soviet-Ukrainian serial mass murderer.
He was also known by the nicknames The Beast of Ukraine, The Terminator, and Citizen O.
After police arrested the 36-year-old former forestry student on April 16, 1996, Onoprienko confessed to killing 52 people.