Ragna Wettergreen (19 September 1864 – 27 June 1958) was a Norwegian actress.

[1] Ragna Wettergreen was born in Christiania (now Oslo), Norway.

She was the daughter of Olaus Olsen and Inger Marie Rynning Kristianisen.

In 1889 she married the defense attorney Haakon Ingolf Wettergreen (1858–1902).

[2] She is particularly known for several title roles or principal characters in plays by Henrik Ibsen, such as Lady Inger of Ostrat, Hedda Gabler, The Vikings at Helgeland, Rosmersholm, John Gabriel Borkman, Little Eyolf, and The Wild Duck.