In the world, Oscar Demetrio (Oscar Demetrio 
) is a rare male forename. The forename Oscar Demetrio is characteristic of Latin America and the Caribbean, particularly Chile, where it is a rare masculine name, and Peru. Much less frequently, Oscar Demetrio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Oscar Demetrio | Chile, Peru, Mexico, Ecuador, Costa Rica |