Oscar Ihlebæk (9 October 1900 – 10 March 1945) was a Norwegian newspaper editor and resistance member. He was born in Drammen, to a mother from Skoger and a father from Rakkestad. In 1926 he married Fredrikke Wium from Drammen, and they had two children. At the time he resided in Asker where he chaired the local Socialist Youth League chapter.