Last name Østerhaug (Østerhaug 
) , all around the world, is a very rare cognomen. The last name Østerhaug is habitual in Northern Europe, particularly Norway, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Østerhaug | Norway |
| martin østerhaug Norwegian musician (b. 1979) |
|
|
| even waalen østerhaug (b. 1999) |
|