Marie Olaussen (born 1997) is a Norwegian orienteering competitor who runs for the club Fredrikstad SK.

[1] Olaussen represented Norway at the 2021 World Orienteering Championships in the Czech Republic, where she placed 11th in the middle distance.

[2] She won a bronze medal in the relay with the Norwegian team, along with Kamilla Steiwer and Andrine Benjaminsen.

[3] She placed eighth in the long distance at the 2023 World Orienteering Championships,[4] and won a bronze medal in the relay with the Norwegian team.

[6] Olaussen was running the second leg in the relay at the 2024 European Championships, winning silver medal for Norway along with Kamilla Steiwer and Andrine Benjaminsen.