Family name Onichtchenko (Онищенко 
, Онишченко , Onichtchenko 
) , all around the world, is a common surname. The surname Onichtchenko is habitual in Ukraine, where it is quite a common surname, Russia, and Kazakhstan, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Онищенко | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
| Онишченко | Russia |
| Onichtchenko | Estonia, Germany, United States, Canada |