Cognomen Kourilko (Курилко 
, Kourilko 
) , in all the world, is quite a rare family name. The surname Kourilko is characteristic of Ukraine, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Курилко | Kazakhstan, Ukraine, Belarus, Russia |
| Kourilko | United States, Belarus |