Eugen Semitjov (22 May 1923 - 12 June 1987) was a Swedish journalist, writer and artist of Russian descent, born in Sweden.

He was an expert on spacecraft, especially Soviet ones, and worked as a translator from Russian during Yuri Gagarin's visit to Sweden.

As a Russian speaker, he obtained rare interviews with people involved in the Soviet space programme.

As well as writing books, he was the author of the science fiction comic Allan Kämpe, first published in December 1942.

At first glance the stories appear to be a straight copy of Flash Gordon, but the comic has more in common with Sidney Jordan's 'Jeff Hawke'.