Surname St-Julien (St-Julien 
) , across the world, is a very rare cognomen. The last name St-Julien is characteristic of Canada, where it is a rare surname, France, where it is an extremely rare surname, and the United States. Parts of the name also exists independently as a first name Julien.
| VARIANT | COUNTRY |
|---|---|
| St-Julien | United States, Canada, France |