Katja Maria Riosianu Medbøe (3 December 1945 – c. 13 November 1996) was a Norwegian actress.

Medbøe was best known for her role in the Hustruer-trilogy (Wives), along with Frøydis Armand and Anne Marie Ottersen.

[1] She also released records with poetry readings set to music.

As a result of a head injury she had experienced pain from the stage lighting.

[3] On 3 May 1997, she was found dead in Nordmarka – a forest area north of Oslo.