Surname Демерс (Demers 
, Демерс 
) , all around the world, is a common cognomen. The surname Демерс is habitual in Canada, where it is quite a common surname, New Zealand, where it is quite a rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Demers | France, Canada, United States, New Zealand, Germany |
| Демерс | Russia, Ukraine |