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