Olaf Haraldsson (995–1030; Old Norse: Óláfr Haraldsson) was the King of Norway from 1015 to 1028.
Olaf Haraldsson may also refer to:
Olaf Haraldsson Geirstadalf (died in 934), reputed son of King Harald Fairhair of Norway Olaf III of Norway (c. 1050 – 1093), King of Norway from 1067 to 1093