Surname Островска (Ostrovska 
, Островска 
) , throughout the world, is quite a rare last name. The cognomen Островска is characteristic of Latvia, where it is quite a common surname, Slovenia, where it is quite a rare surname, and Bulgaria.
| VARIANT | COUNTRY |
|---|---|
| Ostrovska | Germany, Czechia, Latvia, Slovenia, Slovakia |
| Островска | Russia, Ukraine, Bulgaria |