Cognomen Opasen (Opasen 
) , in the world, is an extremely rare last name. The surname Opasen is characteristic of Norway, where it is a very rare surname, and Russia, where it is an extremely rare surname. More prevalently, Opasen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Opasen | Bulgaria, Norway, Russia |