Ragna Wettergreen (19 September 1864 – 27 June 1958) was a Norwegian actress.
Born in Oslo, Norway, she made her stage début at Christiania Theatre in 1886. She performed at Christiania Theatre until it closed in 1899, and from then mainly at Nationaltheatret. She is particularly known for several title roles or principal characters in plays by Henrik Ibsen, such as in Lady Inger of Oestraat, Hedda Gabler, The Vikings at Helgeland, Rosmersholm, John Gabriel Borkman, Little Eyolf and The Wild Duck. She also participated in films, first in 1912, in the Danish film Historien om en moder.[1][2]