Clara Sophie Tybjerg née Sarauw (3 March 1864 – 14 January 1941) was a Danish women's rights activist, pacifist and educator.
After her father died she moved to Copenhagen where she worked as a teacher at Den Kellerske Åndssvageanstalt which specialized in educating handicapped children.
On returning to Denmark, together with Thora Daugaard, she founded Danske Kvinders Fredskæde (DKF), the Danish arm of the Women's International League for Peace and Freedom.
Tybjerg was responsible for setting up a study network consisting of 30 women, including Gyrithe Lemche, Henni Forchhammer, Estrid Hein, Matilde Bajer and Ellen Hørup.
They travelled throughout Denmark encouraging women to become members of the DKF by paying one "peace crown" (fredskrone) and signing a list calling for "Justice rather than Might".