Cognomen Sidorchik (Sidorchik 
, Сидорчик 
) , throughout the world, is quite a rare last name. The surname Sidorchik is habitual in Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, where it is a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Sidorchik | Belarus, Russia, Canada, United States |
| Сидорчик | Belarus, Russia, Kazakhstan, Ukraine |