Last name Kosztka (Костка 
, Kosztka 
, קוסטקה 
) , in the world, is a rare surname. The family name Kosztka is characteristic of Eastern Europe, particularly Hungary, where it is quite a rare surname, Belarus, where it is a rare surname, and Ukraine, where it is a very rare surname. In absolute terms, this name is the most popular in Eastern Europe, particularly Hungary, Ukraine, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Костка | Ukraine, Belarus, Russia |
| Kosztka | Hungary, Australia |
| קוסטקה | Israel |
| jános tivadar kosztka RO (b. 1740) |
|