Globally, Julio Sergio (Julio Sergio 
) is a rare male forename. The forename Julio Sergio is habitual in Latin America and the Caribbean, particularly Chile, where it is quite a rare boy's name, Paraguay, and Cuba, where it is a rare male name. Measured by absolute frequency, the name is most common in Latin America and the Caribbean, particularly Chile, Peru, and Paraguay. Much less frequently, Julio Sergio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Julio Sergio | Peru, Paraguay, Chile, Ecuador, Cuba |
Soto, Torres, Huarca, Vargas, Flores, Orrego, Yataco, Quispe, Morales, Miranda, Sanchez, Aguilar, Cabrera, Condori, Pereira, Ramirez, Zuñiga, Urrutia, Martinez, Castillo, Gonzalez, Rodriguez, Guzman, Garcia, Rivera, Romero, Pino, Luna, Silva, Pinto, Ramos, Roman, Rojas, Gomez, Gomes, Leiva, Gutierrez, Tapia, Ulloa, Medina, Muñoz, Santos, Servin, Alfaro, Acosta, Chavez, Castro, Correa, Erazo, and Valenzuela