Family name Kulbachko (Kulbachko 
, Кульбачко 
) , across the world, is a rare last name. The cognomen Kulbachko is characteristic of Belarus, where it is a rare surname, Ukraine, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Kulbachko | Russia, Ukraine |
| Кульбачко | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |