Isobel L. Hannen (born 17 December 1962 as Isobel Torrance Jr.) is a Scottish curler and curling coach.
She is a .
She competed at the 1992 Winter Olympics when curling was a demonstration sport.
Her mother Isobel Torrance is a former competitive curler, and two-time Scottish women's champion. Hannen's daughter Rachel is also a competitive curler.