Surname Kotsjuk (Коцюк 
, Kotsjuk 
) , in all the world, is quite a rare family name. The surname Kotsjuk is habitual in Ukraine, where it is quite a rare surname, Estonia, where it is a rare surname, and Russia. Not in comparison with a country's population, the name is most common in Ukraine, Russia, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Коцюк | Kyrgyzstan, Kazakhstan, Ukraine, Russia |
| Kotsjuk | Estonia |