Cognomen Szmul (Szmul 
) , globally, is a rare surname. The last name Szmul is characteristic of Poland, where it is a rare surname, France, where it is a very rare surname, and Canada. Not in comparison with a country's population, it is commonest in Poland, France, and the United States. More frequently, Szmul is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Szmul | France, Argentina, Brazil, Poland, United States |