Irina Bjørnø (born 16 January 1959 in Moscow, Russia) is a Russian-born Danish writer and former physicist.

Bjørnø has worked as associate professor in Danish Technical University since 1992, where she guided PhD students and run European Union projects.

In 1998, she established UltraTech (engineering consultancy in ultrasounds projects for applications in industry), where she was the director.

She established a publishing company Belbooks - "Books for Easy living" promoting healthy lifestyles, peace and friendship.

Bjørnø has worked with a broad range of subjects, as poetry and novels - and media.