Ole Andreas Kopreitan (19 September 1937 – 23 January 2011) was a Norwegian political activist, best known as an anti-nuclear activist. For 30 years he led the anti-nuclear organization "No to Nuclear Weapons". He was born in Stavanger as a son of Christian missionary Ole August Kopreitan (1885–1941) and clothing worker Anna Ottervig (1907–1999). He grew up at Hitra, but moved to Hurdal when he was nine years old. He was educated at the teacher's college in Sagene.