Sergey Aleksandorovich Dyachenko () (18 September 1952 – 26 October 2016) was a Kazakh born and Soviet politician, Vice Chairman of Mazhilis from 2012 to 2016, member of the Mazhilis from 2012 to 2016, Parliamentary Leader of Nur Otan from 2015 to 2016, and Akim of Aktobe Region from 2010 to 2012.