Cognomen Crusta (Kors 
, Crust 
, Korst 
) , throughout the world, is quite a rare last name. The surname Crusta is characteristic of Netherlands, where it is quite a rare surname, Israel, and Estonia. Not in comparison with a country's population, the name is most common in Netherlands, the United States, and Germany. Much less frequently, Crusta is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kors | Netherlands, Israel, United States, Germany, Indonesia |
| Crust | Australia, United Kingdom, United States, Germany, Indonesia |
| Korst | Netherlands, Australia, Canada, United States, Germany |
| Crusta | Argentina, United States, Brazil |