Globally, San Carlos (San Carlos 
) is a very rare boy's first name. The forename San Carlos is characteristic of Latin America and the Caribbean, particularly Uruguay, where it is a rare masculine name. More prevalently, San Carlos is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| San Carlos | Mexico, Uruguay, Colombia, Chile, Philippines |
Maxi, Jenny, Nancy, Elmer, Edwin, Edgar, Hydie, Vilma, Irene, Zaldy, Mariel, Martin, Marcos, Melvin, Mechel, Alicia, Andres, Andrew, Amparo, Philip, Rommel, Ronald, Lumen, Denis, Rodel, Racel, Alex, Alma, Andy, Aiza, Dick, Lany, Leah, Jose, Juan, Nida, Ronnie, Elmo, Maria, Myrna, Salve, Sally, Sonny, Allan, Angel, Arwin, Amado, Carlo, Fely, and Ronnel