Jannike Irene Østby (born 1978) is a retired Norwegian cross-country skier.
She made her World Cup debut in March 2000 at the Holmenkollen ski festival, finishing 45th in the 30 km.
She improved to a 19th place in January 2003 in Nové Město na Moravě, but her last World Cup outing was the 2003–2004 season opener at Beitostølen where she finished a measly 67th.
[1] She represented the sports clubs Rustad IL,[1] SFK Lyn and Bækkelagets SK.
This biographical article relating to Norwegian cross-country skiing is a stub.