Family name Козловска (Kozlovska 
, Козловска 
) , throughout the world, is quite a rare cognomen. The last name Козловска is habitual in Latvia, where it is quite a common surname, Lesotho, where it is quite a rare surname, and Lithuania. Not in comparison with a country's population, it is the most numerous in Latvia, Czechia, and Lithuania.
| VARIANT | COUNTRY |
|---|---|
| Kozlovska | Czechia, Lesotho, Bulgaria, Latvia, Lithuania |
| Козловска | Russia, Ukraine, Bulgaria, Belarus |