Cognomen Oustenko (Устенко 
, Oustenko 
) , around the world, is quite a rare family name. The surname Oustenko is characteristic of Ukraine, where it is quite a rare surname, Kazakhstan, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Устенко | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Oustenko | Spain, United States |