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 | United States, Indonesia, Germany, Israel, Netherlands |
| Crust | Australia, United Kingdom, United States, Indonesia, Germany |
| Korst | Australia, United States, Netherlands, Germany, Canada |
| Crusta | Brazil, Argentina, United States |