Surname Koretskaja (Корецкая 
, Koretskaja 
) , all around the world, is quite a rare last name. The cognomen Koretskaja is habitual in Belarus, where it is quite a rare surname, Russia, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Корецкая | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Koretskaja | Estonia, Belarus |