Surname Korsunskii (Korsunskii 
, Корсунский 
) , throughout the world, is quite a rare last name. The family name Korsunskii is habitual in Russia, where it is a rare surname, Belarus, and Kazakhstan, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Korsunskii | Russia |
| Корсунский | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |