Surname Delcastillo (Delcastillo 
) , all around the world, is quite a rare cognomen. The last name Delcastillo is habitual in the United States, where it is a rare surname, Bolivia, and the Dominican Republic. Measured by absolute frequency, it is the most numerous in the United States, Philippines, and Colombia. Much less frequently, Delcastillo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Delcastillo | Bolivia, Canada, Colombia, Philippines, United States |
| doc delcastillo American ice hockey player, US (b. 1968) |
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