Cognomen Oiler (Oiler 
, Ойлер 
) , in all the world, is a rare surname. The family name Oiler is characteristic of the United States, where it is a rare surname, Kazakhstan, and New Zealand. In absolute terms, the name is most common in the United States, Kazakhstan, and Russia. Very seldom, Oiler is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oiler | Germany, Peru, United States, Brazil, New Zealand |
| Ойлер | Kyrgyzstan, Kazakhstan, Russia |