Sergey Aleksandrovich Dyachenko (Russian: Сергей Александрович Дьяченко; 18 September 1952 – 26 October 2016) was a Kazakh-born Soviet politician.

Subsequently, he graduated from the Alma-Ata Higher Party School where he earned a PhD in political science.

The topic of his doctoral dissertation was "Problems of democratic modernization in Kazakhstan (political science analysis)".

From 1991 to 1993, Dyachenko worked as Deputy Chairman of the State Committee of the Kazakh SSR for Youth, Physical Education and Sports, and Deputy Minister of Tourism, Physical Culture and Sports of Kazakhstan.

In 2006, he was chosen as a Deputy Chairman of the Assembly of Peoples of Kazakhstan and was a member of the Political Council of Nur Otan.