Cognomen Casilla (Casilla 
, كاسيا 
, קאסייה 
) , in the entire world, is quite a common surname. The last name Casilla is habitual in Latin America and the Caribbean, particularly the Dominican Republic, where it is quite a common surname, Bolivia, where it is quite a rare surname, and Peru. Measured by absolute frequency, it is the most numerous in the Dominican Republic, Philippines, and Peru. Very seldom, Casilla is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Casilla | Bolivia, Philippines, Dominican Republic, Colombia, Peru |
| كاسيا | Iraq |
| קאסייה | Israel |
|
santiago casilla Baseball pitcher, DO (b. 1980) |
|
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alexi casilla Dominican Republic baseball player, DO (b. 1984) |
|
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kiko casilla Spanish association football player, ES (b. 1986) |
|
| robert casilla American artist and illustrator, US (b. 1959) |
|
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| josé antonio casilla Spanish volleyball player, ES (b. 1979) |
|