King Olaf II of the Isle of Man, known as Olave in some texts, was the older brother of his predecessor, King Ragnald.

His younger brother usurped his succession to the throne and it was only after years of campaigning against his brother's rule that Olaf killed him and took the throne in the year 1229.

Olaf died in the year 1237 at Peel Castle. He was succeeded by his son, who became King Harald.