Worldwide, Marcos Diego (Marcos Diego 
) is a very rare boy's given name. The first name Marcos Diego is characteristic of Latin America and the Caribbean, particularly Costa Rica, where it is a rare boy's name, Chile, where it is a very rare masculine name, and Peru. Measured by absolute frequency, this name is the most popular in Peru, Chile, and Spain. Very seldom, Marcos Diego is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Marcos Diego | Costa Rica, Peru, Ecuador, Spain, Chile |