Ellen Sofie Olsvik (born 7 July 1962) is a Norwegian orienteering competitor, world champion in the relay event, and winner of the first overall Orienteering World Cup.

Olsvik won a gold medal in the relay event at the 1987 World Orienteering Championships, together with Ragnhild Bratberg, Ragnhild Bente Andersen and Brit Volden.

[3] She received a gold medal in relay at the 1986 World Ski Orienteering Championships in Batak, Bulgaria, together with Toril Hallan and Ragnhild Bratberg.

[4] She also competed in cross-country skiing, with a silver medal in the 20 km race at the national championships.

This biographical article about a Norwegian orienteer is a stub.