In all the world, Sergio Antonio (Sergio Antonio 
) is a common masculine forename. The first name Sergio Antonio is habitual in Latin America and the Caribbean, particularly Chile, where it is quite a common masculine name, Costa Rica, and Peru, where it is quite a rare boy's name. In absolute terms, this name is the most popular in Chile, Spain, and Costa Rica. Much less frequently, Sergio Antonio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sergio Antonio | Costa Rica, Peru, Ecuador, Spain, Chile |