Surname Casarrubias (Casarrubias 
) , globally, is a common last name. The surname Casarrubias is habitual in Mexico, where it is quite a rare surname, the United States, where it is a rare surname, and Canada, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Casarrubias | Spain, Canada, Colombia, Mexico, United States |