Family name Casarín (Casarín 
, Касарин 
) , in the entire world, is a rare last name. The last name Casarín is habitual in Belarus, where it is a rare surname, Russia, and Mexico, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Casarín | Mexico, Argentina |
| Касарин | Belarus, Kazakhstan, Russia |
| horacio casarín Mexican footballer (1918-2005), MX (b. 1918) |
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| javier lópez casarín Mexican politician |
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| ángel casarín |
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