Family name Kostiouchko (Костюшко 
, Kostiouchko 
) , worldwide, is quite a rare cognomen. The family name Kostiouchko is habitual in Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, and Russia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Костюшко | Kazakhstan, Ukraine, Belarus, Russia |
| Kostiouchko | United States |