Cognomen קורצ'אק (Korczak 
, קורצ'אק 
) , around the world, is quite a common family name. The family name קורצ'אק is habitual in Poland, where it is quite a common surname, Israel, where it is a rare surname, and Germany. Not in comparison with a country's population, it most frequently occurs in Poland, Germany, and the United States. Likewise, קורצ'אק is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Korczak | Germany, United States, Poland, Canada, France |
| קורצ'אק | Israel |