Kyrylo Dmytrovych Synelnykov (Ukrainian: Кирило Дмитрович Синельников; 29 May 1901 – 16 October 1966) was a Soviet and Ukrainian physicist who participated in the Soviet atomic bomb project.

Synelnykov was born in Pavlohrad.

In January 1921, he was accepted into the M. V. Frunze Crimean University, and graduated two years later.

The Synelnykov Prize for outstanding works in the field of physics is named after him.